Skype For Business For Mac Inactivity Timer

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Received error message 'this message wasn't sent' when sending IM in Skype for Business Edit

When sending an instant message using Skype for Business, you may see the error message 'This message wasn't sent to ...' This can be caused for a variety of reasons.

ForSkype for business for mac inactivity timer download

Scenario 1

  1. Jan 16, 2018 The time is calculated in minutes and the maximum amount of minutes you can set is 360 or 6 hours. Once done, click OK. Now Skype for Business will rarely show you as inactive or away. If you use a company device, then the Inactive and Away times will be controlled by the system administrator.
  2. After your status has been “Inactive” for a specified period of additional time, Skype for Business continues to show the yellow status indicator and displays the word “Away.” Five minutes is the default period for first 'Inactive' then 'Away,' but you can specify a longer (or shorter) times for either or both, if you want to.

Download and install Skype for Business on Mac. Skype for Business makes it easy to connect and collaborate with coworkers and business partners around the world: Start instant message conversations and voice or video calls. See when your contacts are available online. Schedule and join meetings. Present your screen during meetings.

The first user sends an instant message to a second user. The first user sees a message like the screen shot below.



This is due to a bug in the Microsoft Office Software released as an update sometime in October of 2016. The status that the user sees is showing that the second user is signed into Skype for Business Desktop client and a Polycom phone as well.


Ensure both users update their version of Office or Skype for Business to a version that is at least 7766.XXXX or higher. To update Office see How to Manually Update Microsoft Office Products
Note: This resolution is not currently compatible with Mac computers. A compatible resolution is in development but does not have an estimated release date.

Scenario 2

The first user sends an instant message to a second user. The first user sees a message like the screen shot below

The second user sees a message on their mobile device like the screen shot below


This is due to the second user being logged into a Skype for Business Mobile Client and the second User ignores the message


At this time, there is not a resolution to this since we are a hosted Skype for Business Solution, Microsoft doesn’t support server side conversation history. If they did support server side conversation history for a hosted solution, then User B who ignored the IM on their mobile device would get a missed conversation notification in their email and User A would not see an error message on their desktop Skype for Business client.

Work Around

Make certain that users are signed in to a single primary device. If signing in to mobile is necessary, sign out of desktop client.



Skype for Business Online will be retired on July 31, 2021. If you haven't upgraded your Skype for Business Online users to Microsoft Teams before that date, they will be automatically scheduled for an assisted upgrade. If you want to upgrade your organization to Teams yourself, we strongly recommend that you begin planning your upgrade path today. Remember that a successful upgrade aligns technical and user readiness, so be sure to leverage our upgrade guidance as you navigate your journey to Teams.

This is deployment guide will help you deploy Skype for Business Online IP phones.

In all types of businesses, having a phone number allows users to make and get voice calls, and it is an important requirement to do business. Users who have phone numbers will be able to make voice calls across all Skype for Business devices including IP phones, PCs, and mobile devices. You can learn more about Skype for Business IP phones by reading Getting phones for Skype for Business Online.

Deployment steps for IP phones

Step 1 - Download the manufacturer's administrator guides and phone manuals

Before you get started, it's a good idea to download the phone manufacturer's administration guides and phone user manuals.

  • For Polycom phones, see the Poly Documentation Library.

  • For Yealink phones, see Yealink Skype for Business HD SIP Phones Solution.

  • For AudioCodes phones, see the Audiocodes Provisioning Management Guide.

Step 2 - Make sure you're purchasing or migrating a Skype for Business Supported IP phone and firmware


A Skype for Business Online supported phone and firmware is compatible for Skype for Business Server as well, but the opposite isn't always true. To make sure you are buying or provisioning a supported phone and firmware, see Getting phones for Skype for Business Online.

Step 3 - Checking that the right firmware is installed and update the firmware if required

Check the firmware version on your phones. For:

  • Polycom VVX phones, go to Settings > Status > Platform > Application > Main.

  • Yealink phones, go to Status on the main phone screen.

  • AudioCodes phones, go to Menu > Device Status > Firmware version from the start screen.


    For remote access to phone details, refer to manufacturer administration guides. See the links above for the user guides and phone manuals.

  • Lync Phone Edition (LPE) phones, go to Menu > System Information from the start screen.

Step 4 - Device Update Considerations


Polycom firmware prior to 5.5.1.X had a manufacturer-specific device-lock mechanism that is replaced with a Skype for Business implementation 'Phone-Lock.' Upgrading a phone from 5.4.X.X that was secured with 'Device-Lock' to 5.5.1.X with 'Phone-Lock' won't inherit the PIN code from 'Device-Lock,' which can leave the phone unsecured. Users who have activated 'Device-Lock' need to enable the following Polycom Device Profile parameter to give users control of time of upgrade (lync.deviceUpdate.popUpSK.enabled=1).

Firmware updates are managed by the Skype for Business Service. Every Skype for Business certified phone's firmware is uploaded to the Skype for Business Update server, and device update is enabled on all phones by default. Depending on the inactivity time on the phone and polling intervals, phones will automatically download and install the latest certified builds. You can disable the device update settings by using the Set-CsIPPhonePolicy cmdlet and setting the EnableDeviceUpdate parameter to false.

When a new firmware is available and ready for download and install, the phone will notify the user. Polycom phones will notify the user and provide them with an option to Update or Postpone.

For a Polycom phone, you can update the firmware on the phone by selecting SwUpdate.

You can also choose to manage firmware updates using a partner provisioning system. For partner provisioning system management including advanced phone customization, refer to manufacturer administration guides.


Make sure to have a single device update authority (In-band device update or a third-party provisioning server) to avoid update loops.

Step 5 - Configuration and infrastructure phone settings

You can set up the most commonly used phone options and policies using Skype for Business In-band management Windows PowerShell cmdlets. See Set-CsIPPhonePolicy for details of those parameters and settings.

Skype For Business For Mac Inactivity Timer

For network infrastructure planning, see Skype Operations Framework.

Step 6 - Preparing for users to sign in

To enable users to successfully sign in to a Skype for Business Online phone and make calls, you need to make sure users are assigned the correct licenses. At a minimum, you will need to assign a Phone System license and a Calling Plan. For additional information, you can see Skype for Business and Microsoft Teams add-on licensing and Assign Skype for Business and Microsoft Teams licenses.

You can find out more about Calling Plans by reading Phone System and Calling Plans

  • Sign-in options that are available for Online users are:

    • Users with Polycom VVX 5XX/6XX phones will see:

    • Users with Yealink T48G/T46G phones will see:

      For details on sign-in options supported by the manufacturer, see Getting phones for Skype for Business Online.

  • User ID Using the phone's keypad or on-screen keyboard (if available), users can use their organization's user name and password to sign in to the phone. For example, they should use the UPN format like [email protected] for their user name.


    PIN authentication isn't supported for Skype for Business Online for LPE and Partner IP phones.

  • Using a PC When Better Together over Ethernet (BToE) software is installed on user's PC and enabled, users can log in to their phones using the authentication window on their Windows Skype for Business App. See What is Skype Operations Framework (SOF) and Skype Academy? for other information.


    Users are required to use their organization's user name and password to sign in to the phone. For example, they should use the UPN format like [email protected] for their user name.

  • Using a Web Sign-in: This is a new way for Online users to authenticate using a standard web browser. Users will be provided with a set of instructions to follow when they use a browser to sign in.

    • Users with Polycom VVX 5XX/6XX phones will see:

    • Users with Yealink T48G/T46G phones will see:

      The code that is generated will expire in 15 minutes. When it expires, the user will have to click Retry or OK to generate a new code, depending on the phone.

    • Users with Polycom VVX 5XX/6XX phones will see:

    • Users with Yealink T48G/T46G phones will see:

      Using a browser, navigate to the address displayed on the phone and enter your Skype for Business username.

      Enter the code shown on the phone.

      Verify that the site shows '[Phone Manufacturer name] Skype for Business Certified Phone,' and click Continue.

      Click the user's credentials or click Use another account:

      When the following page is displayed, it is safe to close the browser.


      LPE phones for Skype for Business Online support sign-in through USB tethering only.

  • Supported deployments The table below shows the supported authentication types for the currently supported deployment models including Exchange Integration, Modern authentication with Multi-factor Authentication (MFA), and Skype for Business Online and on-premises.

Skype for BusinessExchangePhone Sign-In methodSkype for Business accessExchange Access with Modern Auth and MFA disabledExchange Access with Modern Auth and MFA enabled
OnlineOnlineWeb Sign-inYesYesYes
OnlineOn-premisesWeb Sign-inYesNoNo
On-premisesOnline/On-PremisesPIN AuthenticationYesNoNo
On-premisesOnline/On-PremisesSign-in via PC (BTOE)YesYesN/A
  • Phone features The feature set may vary slightly based on the IP phone partner. For the complete feature set and for more information on the features for each phone manufacturer, see Getting phones for Skype for Business Online.

  • Phone-Lock is a recently introduced feature in Skype for Business certified phones that is used to secure a phone. If enabled, users will be asked to create a PIN upon successful authentication. Once created, phones will lock when the idle-timeout that you define expires, a user manually locks their phone, or they sync their phone-lock with their PC lock using Phone Pairing. If the phone-lock PIN is entered wrong several times, the phone will either sign the user out or require an administrator's code to unlock the phone, but this will vary depending on the phone partner. The user's PIN should be between 6 and 15 digits.

    You can disable Phone-Lock for your organization (which is enabled by default), change the idle-timeout, and choose whether users can make phone calls while they are locked or not using inband-settings. See Set-CsUCPhoneConfiguration for more details on those settings.

Step 7 (optional) - If you have device pairing and Better Together over Ethernet (BToE)

BToE is a phone paining mechanism for Partner IP phones that pairs a user's phone with their Windows Skype for Business app. BToE enables users to:

  • Sign in to their IP phone using their Skype for Business desktop app (using a PC)

  • Synchronize Phone-Lock with PC lock

  • Click to call

BToE can be configured to operate in two modes: Auto (default) and Manual . It can also be enabled (default)/disabled for users using Skype for Business in-band settings. When operating in Manual mode, users will have to take an additional step to pair their phone with their Windows app.

To deploy BToE to users

  1. Connect their PC to their phone using the PC port.

  2. Download and install the latest BToE software from the manufacturer website from the links below. For a better user experience, you can distribute and install the BToE software using an admin distribution solution such as Microsoft Endpoint Configuration Manager. For help using Configuration Manager, See Packages and programs in Configuration Manager.

  3. The server setting for BToE is set to Enabled and Auto mode by default. To change those settings, see Set-CsIPPhonePolicy.

Skype For Business For Mac Inactivity Timer Download


BToE isn't currently supported on Mac and VDI platforms.

Skype For Business Mac Issues

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