IMAP Configuration for Ms-Outlook 365 …
https://support.rediffmailpro.com/article/imap-configuration-for-ms-outlook-365/
Login to your admin@ account. Click on Admin->Other Services->Complete Mail Sync. Select Unassigned -> Select the required accounts, Date and Save it. Limit the emails for IMAP. Incoming server (IMAP) : 993. Use the following type of encrypted connection: Select SSL. Outgoing server (SMTP) : 465 or 586. Use the following type of encrypted connection : Select SSL. Server Timeouts : Make it Longer than a Minute.
Login to your admin@ account.
Click on Admin->Other Services->Complete Mail Sync.
Select Unassigned -> Select the required accounts, Date and Save it.
Limit the emails for IMAP.
Incoming server (IMAP) : 993. Use the following type of encrypted connection: Select SSL.
Outgoing server (SMTP) : 465 or 586. Use the following type of encrypted connection : Select SSL.
Server Timeouts : Make it Longer than a Minute.
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