I just went through a stupid unnecessary Skype update last night and lost all sign of all my previous contacts etc.
If you and others suffered the same problem and had a working Skype before, the solution I discovered is you're probably signed into the wrong account and it seems that one could have two accounts setup, one with microsoft and one with skype.
The difference I discovered is my old working Skype account only uses a user nickmame + password for access, the microsoft account if you ended up setting one up uses a email address or MS phone number.
If you end up in an account without any contacts, ie, the wrong Skype account the solution is to logout and then try logging in but use only your old Skype username, not your email address, and the associated password, and all your old contacts should appear.
This is for Mac Skype users anyway and I hope this helps some users.
What a waste of time getting Skype to work as expected, or at least with some of the features it still has left.
- Patrick
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