Monthly Archives: September 2015

Skype for Business and High Definition Photos

In Skype for Business Server 2015 photos can be stored in a user’s Microsoft Exchange Server 2013 mailbox; that allows for photo sizes up to 648 pixels by 648 pixels. In addition to that, Exchange 2013 can automatically resize these photos for use in different products as needed. That means three different photo sizes and resolutions:

  • 48 pixels by 48 pixels, the size used for the Active Directory thumbnailPhoto attribute. If you upload a photo to Exchange 2013 Exchange will automatically create a 48 pixel by 48 pixel version of that photo and update the user’s thumbnailPhoto attribute. Note, however, that the reverse is not true: if you manually update the thumbnailPhoto attribute in Active Directory the photo in the user’s Exchange 2013 mailbox will not automatically be updated.
  • 96 pixels by 96 pixels, for use in Microsoft Outlook 2013 Web App, Microsoft Outlook 2013, Skype for Business Web App, and Skype for Business.
  • 648 pixels by 648 pixels, for use in Skype for Business and Skype for Business Web App Skype for Business Web App.


Note: If you have the resources, it is recommended that you upload 648×648 photos; that provides the maximum Continue reading

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Filed under Exchange 2013, HD Photo, OAuth, Skype for Business Server 2015

Resolution to multiple users associated with the source phone number error

I had an error message recently that appeared in the client logs for a user with Enterprise Voice enabled. The Skype for Business Client informed the user that the call could not be completed. This was the same for any call made.

Each time a call was attempted to the PSTN, the following message appeared in the client logs:

ms-diagnostics: 4002;reason=”Multiple users associated with the source phone number”


This error was meaningful and pointed me to the cause. It is telling us that two or more users have the same phone number assigned to them in the Skype for Business Control Panel.

Finding these users was easy with PowerShell!


This is how we do it: Continue reading

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Filed under Errors, PowerShell, Skype for Business Server 2015