Forum Discussion

Copper Contributor

Aug 27, 2018

Public folders not receiving email and Office365 Admin Centers are extremely slow

Set up O365 for the company after on-prem exchange died a fiery and painful death. They have a number of public folders that receive email. They all bounce externally saying: 550 5.4.1 [public@email...

office 365

Adam Ochs

Steel Contributor

Aug 27, 2018

Hey Michael Leone,

No idea if this is the root cause but worth testing out. I had all sorts of issues with Public folders for a client when I was doing a hybrid migration from 2010, up to O365, as with PF's I had to first go to 2016.

Is your domain set to Internal Relay, or Authoritative?

When the domain type is set to Authoritative, Directory Based Edge Blocking allows any SMTP address that has been added to the service, except for mail-enabled public folders.

So if your domain is sitting as authoritative it can cause problems. If it is, try setting it to Internal Relay, and give it some time to propagate, then test again.

Again, not sure this will help, but that was my problem.

Adam

VasilMichev
MVP
Aug 27, 2018
DBEB would be my primary suspect here as well, so +1 to what Adam said above. Just wanted to add this blog article with more details, especially if you are in a hybrid config: https://blogs.technet.microsoft.com/exchange/2017/05/19/office-365-directory-based-edge-blocking-support-for-on-premises-mail-enabled-public-folders/

In addition, make sure to run a (detailed) message trace to get more details. If the message is not visible at all there, it's another hint that DBEB might be causing this.