Disable Office365 Legacy Protocol Access

Wednesday 9th October 2019 09:00 AM

Purpose: In an effort to increase the security of our Office 365 tenant and our on-prem environment, we are going to modify the Azure AD conditional access policy restricting legacy protocol (SMTP,IMAP,POP3) access to Office365 mailboxes. The modification will block all access to these protocols with the exception of 555 users which were identified to be using IMAP or SMTP over the last 180 days.

Impact: MEDIUM

Affected: Office365 users leveraging SMTP, IMAP, and POP3 legacy protocols

Posted On: Wednesday 2nd October 2019 12:47 PM