Outlook 2016

We have Exchange 2010, and everything appears to be normal for all outlook clients except Outlook 2016.

We are able to get the client to connect normally, and it works for a few days, but every time, and after a few days (sometimes a week or a little more) the 2016 client stops being able to update the server.

Outlook 2016 still retrieves mail, but if you delete or move a message, it only happens on the client. OWA or phones never get the changes, and after some time, the change will revert when the client syncs with the server again. Same thing with calendar entries. You can update something, but it will never show up in OWA, and eventually will revert, as if you never did it.

Environment is Exchange 2010 on Server 2008R2
Windows 10 clients connected via VPN
Autoconfig passes tests
Current patches and updates on both the server and workstations.
DrPingAsked:
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JohnBusiness Consultant (Owner)Commented:
Try going back to Office 2013.  At one client, we were told that Outlook 2016 needed a registry patch to work properly with the hosted Exchange service (I cannot verify this). We changed back to Office 2013 and that is working fine.

You may need to wait a bit before Outlook 2016 gets patched.
Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:
lol outlook 2016 dear lord. not already.

Office 2013 all day until Office 2016 SP1 is available, 6 months at least usually.

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Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:
Pretty sure the changes will take effect if you remove the setting "cached exchange mode" from one of the outlook 2016 profiles.

Why this is happening is another story.
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DrPingAuthor Commented:
All previous versions of Outlook work normally.

2016 works normally the first few days, but once it's broke... even recreating the profile will not resolve the issue.

Removing cached mode is a good idea, and I bet you're right it will fix updating the server :>)
However, several users have huge mail boxes, so I'm not sure their performance will be acceptable.
May have to look for that other story.

But I'll let you know about cached mode.
Thanks!
DrPingAuthor Commented:
Mark was right, that removing cached mode now updates to the server, but it's unbearably slow.

The affected PC's were purchased with Office 2016 OEM.

No Downgrade rights.
DrPingAuthor Commented:
Turns out it wasn't an Outlook problem at all. Repaired the mailbox in Exchange and all is well.
DrPingAuthor Commented:
Ran a mailbox repair on the exchange server fised it.
DrPingAuthor Commented:
aasd
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