Cannot perform public internet connectivity (PIC) web service call for a long time. Exception: %1 Stack Trace: %2 Cause: ...

Lync Server 2013

Cannot perform public internet connectivity (PIC) web service call for a long time.

Exception: %1
Stack Trace: %2
Cause: Cannot perform public internet connectivity (PIC) web service  call for a long time.
Resolution:
Use Get-CsProvisionServiceConfiguration to check if the public internet connectivity (PIC) web service Url is correct. And verify that you can connect to it.

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