Activesync - you don't have permission to sync with this server

David Barman
David Barman used Ask the Experts™
on
Added new Exchange 2016 server.  Old Exchange 2010 server is the internet facing server.  In the process of migrating mailboxes to the new 2016 server.  Users that have been migrated now don't receive any updates on mobile/activesync devices.  If I attempt new account setup for one of those users we receive "You don't have permission to sync with this server".  What do I need to do so all mailboxes (on both the 2010 and the 2016) can use activesync?
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Senior Systems Admin
Top Expert 2010
Commented:
Make sure your 2016 server is the one that is Internet-facing. Exchange 2010 can't proxy connections to 2016 based mailboxes, but 2016 can proxy to 2010. During your migration, though, you'll want to have both servers internet-facing, since some external connections get redirected instead of proxied.

Author

Commented:
Both internet facing?  So I would need separate external ips and A records for each?
Adam BrownSenior Systems Admin
Top Expert 2010
Commented:
Yes. Exchange 2010 would preferably use legacy.domain.com while 2016 would use your normal A records. If this isn't set up like that, some users won't have access to Exchange through some methods during the migration period, 2016 users if only 2010 is on the Internet, 2010 users if only 2016 is on the Internet.

Author

Commented:
Do you mean activesync or outlook anywhere users or both?
Seth SimmonsSr. Systems Administrator

Commented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Split:
-- Adam Brown (https:#a42078632)
-- Adam Brown (https:#a42078674)


If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

seth2740
Experts-Exchange Cleanup Volunteer

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial