Caller ID issues with skype for business online

Hey all, one of our users (at least we think it is only one) is having issues with caller ID, note that we use skype for business/O365 online.


For example: When he calls me I see his proper skype/office # on  the caller ID because he is calling me from his skype for business account....but if I miss the call, I do get an email notification....but in the details it shows as if the call came from his mobile #.


Any idea where the issue could be?


I did notice something in the desktop client settings...under Options - Phones, I do see his office and mobile #s listed, but am unable to change the mobile# because the "Mobile Phone" button is greyed out (see attached image)

I found this article that said its an admin setting, but I can't find it anywhere...again, not sure if this is the cause but figured I would mention it.

https://support.office.com/en-us/article/change-my-phone-number-for-skype-for-business-20e03cc1-c023-4e5d-bafd-064ddb59ed5e?ui=en-US&rs=en-US&ad=US


Thoughts??
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s aitAsked:
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s aitAuthor Commented:
Fixed by removing the mobile# is AzureAD and updating the local GAL

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