SfBMac: Cannot connect to EWS after enabling EWS Access Policy

In a recent support case the Skype for Business Mac client wasn’t connecting to Exchange Web Services (EWS) after the EWS Access Policy was configured with the following cmdlets:

Set-CASMailbox -Identity brick@borderlands.lab -EwsApplicationAccessPolicy EnforceAllowList -EwsAllowOutlook $true -EwsAllowMacOutlook $true
Set-CASMailbox -Identity brick@borderlands.lab -EwsAllowList @{add=’UCWA/*’, ‘OC/*’, ‘OWA/*’}
https://technet.microsoft.com/library/bb125264(v=exchg.160).aspx

Get-CASMailbox -Identity brick@borderlands.lab | fl Name,EwsApplicationAccessPolicy,EwsAllowOutlook,EwsAllowMacOutlook,EwsAllowList

EWS was working except on Skype for Business Mac, after reviewing the logs the issue was that SfB Mac user agent is SfBForMac.
To fix this we simply add SfBForMac to the EwsAllowList with:

Set-CASMailbox -Identity brick@borderlands.lab -EwsAllowList @{add=’SfBForMac/*’}

Please note that the previous example was only for a test user, we can also configure it on the Organization Level:

Set-OrganizationConfig -EwsApplicationAccessPolicy EnforceAllowList -EwsAllowOutlook $true -EwsAllowMacOutlook $true -EwsAllowList @{add=’SfBForMac/*’,’UCWA/*’, ‘OC/*’, ‘OWA/*’}
https://technet.microsoft.com/library/aa997443(v=exchg.160).aspx

Get-OrganizationConfig |fl Name,EwsApplicationAccessPolicy,EwsAllowOutlook,EwsAllowMacOutlook,EwsAllowList

Skype for Business on Mac Update List: September 2018

Here is the update list for the Skype for Business on Mac:

Download the latest update for Skype for Business on Mac

Version Release Date
16.21.65 September 14, 2018
16.20.90 August 13, 2018
16.19.132 July 13, 2018
16.18.51 June 7, 2018
16.17.65 May 9, 2018
16.16.102 April 3, 2018
16.15.166 February 28, 2018
16.14.163 January 31, 2018
16.13.184 December 7, 2017
16.12.77 November 8, 2017
16.12.75 October 31, 2017
16.11.149 October 5, 2017
16.10.97 August 30, 2017
16.9.37 August 02, 2017
16.8.196 June 20, 2017
16.6.333 May 2, 2017
16.5.185 March 28, 2017
16.3.240 February 6, 2017
16.2.145 December 12, 2016
16.1.456 November 23, 2016
16.0.3638 October 27, 2016 (RTM)

Please also check the Known issues – Skype for Business on Mac.

If you were looking for the previous version here is the list:

Lync Mac 2011

Version Release Date KB Article
14.4.1 July 13, 2016 KB3175174
14.3.3 February 23, 2016 KB3139293
14.2.1 October 1, 2015 KB3098588
14.1.1 July 23, 2015 KB3074981
14.0.11 March 14, 2015 KB3037358
14.0.10 (Hotfix 1) December 3, 2014 KB3019983
14.0.10 October 29, 2014 KB3007876
14.0.9 (Hotfix 1) July 31, 2014 KB2979062
14.0.9 June 10, 2014 KB2963369
14.0.8 April 9, 2014 KB2952672
14.0.7 December 13, 2013 KB2909662
14.0.6 October 8, 2013 KB2888920
14.0.5 (Hotfix 1) September 4, 2013 KB2884053
14.0.5 June 6, 2013 KB2844274
14.0.4 (Hotfix 1) April 18, 2013 KB2836517
14.0.4 February 1, 2013 KB2778095
14.0.1 RTM NA