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Exchange Team Blog

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2,057

Deprecation of Remote PowerShell in Exchange Online – Re-enabling or Extending RPS support

The_Exchange_Team on Mar 27 2023 08:18 AM
We wanted to let you know about the next chapter in our retirement of RPS protocol in Exchange Online.
21.9K

Throttling and Blocking Email from Persistently Vulnerable Exchange Servers to Exchange Online

The_Exchange_Team on Mar 23 2023 10:00 AM
We are enabling a transport-based enforcement system in Exchange Online that will notify, throttle, and block email from...
5,966

Best Practices for Migrating from Exchange Server 2013 to Exchange Server 2019

The_Exchange_Team on Mar 20 2023 09:38 AM
We wanted to provide a final overview of best practices for Migrations from Exchange Server 2013.
109K

Released: March 2023 Exchange Server Security Updates

The_Exchange_Team on Mar 14 2023 10:00 AM
We have released Security Updates for Exchange Server 2013, Exchange Server 2016, and Exchange Server 2019.
5,158

Exchange Server 2013 Reaches End of Support Next Month

The_Exchange_Team on Mar 10 2023 10:26 AM
Exchange Server 2013 reaches End of Support on April 11, 2023!
7,614

Deprecation of Remote PowerShell (RPS) for New Exchange Online Tenants

The_Exchange_Team on Mar 07 2023 08:25 AM
Today, we are announcing that starting April 1, 2023, we will start blocking RPS connections for all tenants created on ...
6,068

Troubleshooting Compliance Retention Policies in Exchange Online

The_Exchange_Team on Feb 27 2023 01:53 PM
In this post, we dig into Exchange Online Compliance Retention Policies and identify issues that you may encounter.
31.3K

Update on the Exchange Server Antivirus Exclusions

The_Exchange_Team on Feb 23 2023 12:21 PM
We are announcing a change in recommended AV exclusions on Exchange servers.
7,294

Troubleshooting Retention Policies in Exchange Online

The_Exchange_Team on Feb 22 2023 12:31 PM
In this post, we delve into Exchange Online Retention Policies and identify issues that you may encounter.
23.7K

Cloud-based Message Recall in Exchange Online

The_Exchange_Team on Feb 16 2023 08:34 AM
Today we’re thrilled to announce that the new Exchange Online Message Recall feature has arrived!
100K

Released: February 2023 Exchange Server Security Updates

The_Exchange_Team on Feb 14 2023 10:00 AM
We are releasing a set of security updates for Exchange Server 2013, 2016 and 2019.
8,990

Exchange Server 2013 End of Support Approaching Fast

The_Exchange_Team on Feb 13 2023 01:38 PM
Exchange Server 2013 reaches End of Support on April 11, 2023, which is less than 60 days away!
28.8K

Protect Your Exchange Servers

The_Exchange_Team on Jan 26 2023 01:08 PM
We’ve said it before, we’re saying it now, and we’ll keeping saying it: it is critical to keep your Exchange servers upd...
14.4K

Introducing Support for Concurrent Exchange Online License Assignments

The_Exchange_Team on Jan 20 2023 06:54 AM
We recently enabled a new feature in Office 365, which allows tenant admins to assign more than one Exchange Online lice...
11.8K

Help us Improve the Exchange Server Update Experience

The_Exchange_Team on Jan 19 2023 11:40 AM
We’re looking into ways in which we can improve the experience of installing Exchange Server Cumulative Updates (CUs) an...
7,366

Content Search for Targeted Collection of Inactive Mailbox Data

The_Exchange_Team on Jan 18 2023 12:52 PM
How can you use Content Search to retrieve Inactive mailbox data? Read on!
10.6K

Exchange Server 2013 End of Support Coming Soon

Scott Schnoll on Jan 12 2023 11:40 AM
Exchange Server 2013 will reach End of Support on April 11, 2023, which is less than 90 days away!
91.6K

Released: January 2023 Exchange Server Security Updates

The_Exchange_Team on Jan 10 2023 10:01 AM
We are releasing a set of security updates for Exchange Server 2013, 2016 and 2019.
18.8K

New opt-in endpoint for POP3/IMAP4 clients that need legacy TLS

The_Exchange_Team on Jan 06 2023 07:17 AM
We have created an opt-in endpoint for POP3/IMAP4 clients still requiring TLS1.0 and TLS1.1.
114K

Basic Authentication Deprecation in Exchange Online – Time’s Up

The_Exchange_Team on Dec 20 2022 11:19 AM
In early January 2023, we will permanently turn off Basic auth for multiple protocols for many Exchange Online tenants.
56.7K

Announcing Deprecation of Remote PowerShell (RPS) Protocol in Exchange Online PowerShell

The_Exchange_Team on Dec 15 2022 07:06 AM
Today, we are announcing that starting June 1, 2023, we will start blocking RPS connections to Exchange Online and will ...
10.9K

Notes from the field: Using app-only authentication with customized RBAC roles in Exchange Online

The_Exchange_Team on Dec 05 2022 07:33 AM
Switching non-interactive Exchange Online PowerShell logons to OAuth.
14.3K

Announcing Public Preview of Role Based Access Control for Applications in Exchange Online

The_Exchange_Team on Dec 01 2022 02:58 PM
Today, we are excited to announce the Public Preview of Role Based Access Control for Applications in Exchange Online.
8,963

Outlook REST API v2.0 and Beta deprecation update

The_Exchange_Team on Nov 23 2022 07:16 AM
We wanted to provide an update on Outlook REST API v2.0 and Beta deprecation.
31K

Basic Authentication Deprecation in Exchange Online – What’s Next

The_Exchange_Team on Nov 16 2022 01:40 PM
We wanted to let you know about the next chapter in our retirement of basic authentication in Exchange Online.
17.2K

Servicing Exchange Server

The_Exchange_Team on Nov 15 2022 12:03 PM
We wanted to provide several updates related to servicing Exchange Server.
106K

Released: November 2022 Exchange Server Security Updates

The_Exchange_Team on Nov 08 2022 10:00 AM
We are releasing a set of security updates for Exchange Server 2013, 2016 and 2019.
19.8K

Deprecating Conversion of Distribution Lists to Microsoft 365 Groups

The_Exchange_Team on Nov 03 2022 08:43 AM
We are deprecating the toolkit for migrating Distribution Lists to Microsoft 365 Groups on February 1, 2023.
26.4K

Cross-tenant User Data Migration is Now Generally Available

The_Exchange_Team on Nov 01 2022 03:43 PM
Today, we’re thrilled to announce that cross-tenant user data migration is now generally available.
11.2K

Deprecating bad item limit and large item limit migration parameters

The_Exchange_Team on Oct 13 2022 06:48 AM
The time has come to fully deprecate Bad Item Limit / Large Item Limit migration parameters and use DCS to measure and g...

Latest Comments

Mr_Chris
in Released: March 2023 Exchange Server Security Updates on Mar 28 2023 09:36 AM
@Robert_Blissitt1930 I did comb through the Feb 2023 blog post, but didn't see much pertaining to MSExchangeMailboxAssistants. I can confirm that the service is crashing and recovering frequently (every few minutes at best). I'll review the blog post at your suggestion to make sure I didn't miss any...
0 Likes
Robert_Blissitt1930
in Released: March 2023 Exchange Server Security Updates on Mar 28 2023 09:28 AM
@Mr_Chris You'll find lots of comments about Event ID 4999 in the February 2023 SU if you visit that blog post. I don't believe these are harmful and I have seen them quite frequently after both the February and March SUs but Exchange continues to perform normally.
0 Likes
Mr_Chris
in Released: March 2023 Exchange Server Security Updates on Mar 28 2023 09:14 AM
I'm seeing the following behavior after applying the March 2023 SU to Exchange 2019 4999 errors relating to MSExchangeMailboxAssistantsWatson report about to be sent for process id: 36208, with parameters: E12IIS, c-RTL-AMD64, 15.02.1118.026, MSExchangeMailboxAssistants, M.E.Query.Core, M.E.Q.C.D.L....
0 Likes
Scott Schnoll
in Throttling and Blocking Email from Persistently Vulnerable Exchange Servers to Exchange Online on Mar 28 2023 07:30 AM
@BrendanToland, the report will release in private preview around mid to end of April. May 23 is when the first wave of affected customers will see the GA version of the report. June is when throttling begins for the first wave, and July is when blocking begins. On the day blocking begins for the cu...
2 Likes
Nino Bilic
in Released: March 2023 Exchange Server Security Updates on Mar 28 2023 06:36 AM
@R_Cay Please DM me through Tech Community platform. I replied to you here in this blog comments that all you needed to do is update Outlook, because your original question (which you can read here) implied to me that you were not an Admin running Exchange server and were wondering about an Outlook ...
0 Likes