
MapiBlockOutlookNonCachedMode seems not working for office 365.Īny viable option/advice to achieve above goal to disable storing all offline cache copies of office 365 emails.? Thanks a lot in advanced. It gives Set-CasMailbox MailboxName -MapiBlockOutlookNonCachedMode:$falseīut again its only for onpremis-exchange according to this. So was looking for an viable alternative. It will still allow users to save offline copies in outlook/thunderbird etc. "Outlook Web App policies" wont disable offline access for outlook/thunderbird etc. Thunderbird will automatically configure your Gmail connection with this info. 13 Select New and click Existing Mail Account. The problem lies with outlook and other clients such as thunderbird. Its at the top-left corner of Thunderbird. This message will appear, which is as expected. If a user tries to enable offline access via

As intended It will disable offline storing in Unfortunately it works only for webaccess. What I have tried is I have applied a policy using "Outlook Web App policies" in ourlook 365 via "permissions" -> "Outlook Web App policies" and disabled offline access in the below manner. We are trying to disable storing emails offline. We use different operating systems, such as mac/ubuntu/fedora/widnows to access emails which makes hard to stick to local group policy to block storing offline cache copies. We use outlook 2016, thunderbird and the exchange server is office 365 tenant.

My company has a security concern and they have requested to disable storing all offline cache copies of office 365 emails.
