(Context, I'd created an email group for members of staff, and I'd made everyone an 'owner' The group had been being used, and there were emails that discussed negotiations with school management. This relates to an 'Office 365 A1' account as part of Office for Schools. Would it be possible for the administrators of the organisation's Office365 to do this, or to recover deleted email? Is it possible for a group owner to delete the email history of a group, so messages that had been sent to the group do not appear in Outlook for any members of the group, without deleting the group completely? Is this possible if the outlook group is restricted to one organisation? Owners have privileges such as being able to add new members or even delete the group completely. Now, you will not be asked to confirm the deletion of items. Scroll down to the Other section and click the Prompt for confirmation before permanently deleting items check box so there is no check mark in the box. After Outlook closes, start it again and repeat steps 2-3.

In Task Manager, click the Processes tab, scroll down to outlook.exe, and click End Process. Copy the path because this is the file you delete to remove an offline cache. If Outlook doesn’t close, press Ctrl+Alt+Delete and click Start Task Manager. This will show you the path to your OST file.

People in the group can be 'members' or 'owners'. Click Advanced in the list of items on the left side of the Outlook Options dialog box. In Outlook, navigate to: Account settings Account Name and Sync Settings Then select 'more Settings' Advanced Outlook Data File Settings. In Outlook365 one can create email group.

Outlook 365 delete emails at exit