Active Sync problem with exchange 2013


I recently migrated my exchange 2007 to exchange 2013.
Active Sync worked perfectly with the old server.
I have an issue with Exchange 2013.  Only several mailboxes can be synchronized and it is impossible with all others.
I don't understand why it is working for 2 ou 3 people and not for everyone...
I am able to configure one mailbox on my mobile phone and not some others mailboxes....

Thanks in advance for your help.
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Alan HardistyCo-OwnerCommented:
Please check the inherited permissions of the problem users and their Group Membership to see if they are members of any groups mentioned in my article:

Activesync Working But Only For Some Users On Exchange 2007 / 2010

It's usually something simple like that which causes the problem.


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Mohammed TahirMicrosoft Exchange and O365 AdministratorCommented:
Please check the event viewer--> Application log and provide us details of events logging on server.

SA-ITAuthor Commented:
Alan Hardisty : You are the best !!!!!  Incredible but it is the solution :)

Thanks for your help!!!
Alan HardistyCo-OwnerCommented:
Was it the permissions or the groups?  It's usually the permissions.
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