8,199 questions with Exchange | Exchange Server | Management tags

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exchange 2019 Owa null reference error

I am running exchange 2019 Cu14 with software Update 1 when access OWA it ask sign in authorization username and password after enter it got OWA null reference error and in event there are lot of event with event id 1309 Exception information:     …

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-09-08T17:49:57.9766667+00:00
Mohammed Rafeeq uddin 0 Reputation points
commented 2026-09-09T22:47:26.93+00:00
Chris-D 1,180 Reputation points Independent Advisor
13 answers One of the answers was accepted by the question author.

After KB5004778 update, unable to access OWA & ECP (http code 500)

Exchange 2013 CU23 After login to OWA or ECP, I encountered http code 500. Before that, I was updated security update KB5004778 (after a few failed attempts). I followed "OWA or ECP stops working after you install a security…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2021-07-18T01:59:12.187+00:00
EM Support 41 Reputation points
answered 2026-09-08T18:51:48.73+00:00
Ceyhun KIRMIZITAS 0 Reputation points Microsoft External Staff
2 answers

We're unable to complete your request server_error: The contextID supplied in the request did not have a matching cookie

Hi, good morning! I was trying to create an account using my name, for example he typed anthonyhello? Clicked next button, then my email is not accepting the question mark, so I try to type it now, he typed ******@outlook.com, I need to create my…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2023-02-05T15:35:34.4+00:00
Anthony Hello 30 Reputation points
commented 2026-09-01T14:01:48.99+00:00
Madhu Kumar 0 Reputation points
1 answer

Email being spoofed Exchange 2019

Exchange 2019. I have an email coming in that appears to be from ******@contoso.com. When you hit reply, the email address is now ******@phisherson.com. In the email itself, you click the ******@contoso.com email address, it shows up as that user's email…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-08-25T16:35:20.56+00:00
Susan Dodds 421 Reputation points
commented 2026-08-26T21:01:01.7466667+00:00
Chris-D 1,180 Reputation points Independent Advisor
1 answer

Exchange 2019 CU14: Server-side search is very slow or fails after mailbox migration from Exchange 2013

Hello, We are troubleshooting a server-side search performance issue after migrating mailboxes from Exchange 2013 to Exchange 2019. Environment Exchange 2013 CU23 still exists in coexistence. Exchange 2019 CU14, build 15.2.1544.36. Two Exchange 2019…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-08-25T10:06:36.0566667+00:00
Vad4 0 Reputation points
edited the question 2026-08-25T17:52:10.4333333+00:00
Vad4 0 Reputation points
6 answers One of the answers was accepted by the question author.

automapping for security group

Hi, As it said on Shared mailboxes in Exchange Online page "Users who are members of the security group will be granted the permissions to the mailbox". Ok, but automapping doesn't work for security group, so it's partially useless. …

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2022-06-27T12:56:03.48+00:00
Fugazi 21 Reputation points
answered 2026-08-24T08:54:20.6466667+00:00
Dion Pennings | MDEX 0 Reputation points
2 answers One of the answers was accepted by the question author.

How to Authenticate Exchange Server(On-Premise) with CBA using java8

Hi everyone, We are currently migrating from Exchange Online to Exchange On-Prem and want to implement pure Certificate-Based Authentication (CBA). Following the official Microsoft documentation…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2025-10-09T08:01:34.2+00:00
Gourav Kumar 60 Reputation points
edited a comment 2026-08-19T08:10:32.66+00:00
Gourav Kumar 0 Reputation points
1 answer

Add owner to distribution list

I own several distribution lists and would like to add an additional owner; however, when I try to do so, I keep receiving an error message.

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-08-18T19:55:44.1266667+00:00
SCARBOROUGH, Helen 0 Reputation points
answered 2026-08-18T20:39:38.4133333+00:00
Hendrix 970 Reputation points Independent Advisor
2 answers One of the answers was accepted by the question author.

Exchange 2019 Certificate Request not generating TXT file

Exchange 2019 Cu14. Not getting the text file for my certificate request to send to the CA. Pending request is showing up in the EAC but can't do more with it in the EAC in Cu14. Folder is shared and allows access to Exchange Trusted…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-08-15T11:38:33.8366667+00:00
Susan Dodds 421 Reputation points
accepted 2026-08-15T11:49:34.05+00:00
Susan Dodds 421 Reputation points
2 answers

Renewing SSL on Exchange 2019

I have a godaddy SSL. I'm doing my first renewal of the certificate. Do I need to do a certificate request from the Exchange server to make the certificate or can I use the one that godaddy made for me without a certificate request? The SSL I'm replacing…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-08-14T03:14:20.8433333+00:00
Susan Dodds 421 Reputation points
edited an answer 2026-08-14T04:02:02.02+00:00
Dora-T 635 Reputation points Independent Advisor
1 answer

Hosted outlook mailbox keeps getting full,

Hello all , i have a one user who have 2 mail boxes , and one of the mail box keeps getting Full all the time , so far we did 5 times to do auto-archive , not affecting , we remove the profile and add one more time , not affecting , we generate a…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-08-12T19:52:04.4133333+00:00
Yogesh Zanzibarwala 0 Reputation points
edited an answer 2026-08-12T20:19:24.2433333+00:00
Ivory 1,155 Reputation points Independent Advisor
1 answer

Exchange server SE issue, single email received mutiple times

hi we have just upgraded to Exchange Sever SE from Exchange server 2019 we are facing an issue regarding the single email received multiple time for some users. header shows the different Message_ID for email with same subject. we have recently installed…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-08-03T09:28:08.0066667+00:00
Usman 0 Reputation points
edited an answer 2026-08-10T04:13:04.28+00:00
Kien 980 Reputation points Independent Advisor
1 answer

exchange email help

several exchange emails came on my inbox and will not delete??

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-08-07T22:49:55.6+00:00
Kay Vick 0 Reputation points
commented 2026-08-08T21:25:49.2+00:00
Ivory 1,155 Reputation points Independent Advisor
1 answer One of the answers was accepted by the question author.

Exchange HCW using 2 Exchange 2016 edge servers (stmp1.domain.com and smtp2.domain.com)

Hi All, Looking for some Exchange hybrid configuration wizard guidance. Scenario: EWS published using hybrid.domain.com 2x Edge Servers configured using dedicated FQDNs - edge1.domain.com and edge2.domain.com If I want high availability for SMTP/Edge…

Exchange | Exchange Server | Other
Exchange | Exchange Server | Other

A robust email, calendaring, and collaboration platform developed by Microsoft, designed for enterprise-level communication and data management.Miscellaneous topics that do not fit into specific categories.

1,648 questions
Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,399 questions
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
Exchange | Hybrid management
Exchange | Hybrid management

The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.

2,455 questions
asked 2023-01-11T10:53:10.8+00:00
Azhar Pasha Syed 40 Reputation points
accepted 2026-08-07T01:37:06.96+00:00
Azhar Pasha Syed 40 Reputation points
3 answers

Duplicates are being imported

Hello, I am using the New-MailboxImportRequest to import .PST files into existing mailboxes. These mailboxes have emails in them that are also included in the .PST file being imported. The import request completes successfully, some needing the…

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

7,399 questions
Exchange | Hybrid management
Exchange | Hybrid management

The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.

2,455 questions
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2021-06-22T01:42:59.563+00:00
LeighHarding 1 Reputation point
answered 2026-07-31T14:31:46.2666667+00:00
Ted Mittelstaedt 61 Reputation points
2 answers

Address List browsing fails when list contains more than 51 objects — Exchange Server 2019

Address List browsing fails when list contains more than 51 objects — Exchange Server 2019 Summary Browsing any address list in the directory fails when the list contains more than 51 recipients. Lists with 51 or fewer objects render correctly. ANR-based…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-07-29T18:04:51.93+00:00
Sergey 45 Reputation points
answered 2026-07-30T00:42:41.78+00:00
Anonymous
2 answers

Installation of Exchange with failed outlook connectivity

Dear community. I've installed Exchange server on my lab on a Hyper-V machine. At first all but a few services did not start. As my home lab is major slow, I take it that it is because of startup speed and dependicies. After I leave the VM start and…

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-07-11T21:47:29.5633333+00:00
Bjarne Petersen 20 Reputation points
edited a comment 2026-07-29T12:37:37.56+00:00
Bjarne Petersen 20 Reputation points
2 answers

How to update Exchange Delegation Federation Certificate in Exchange SE

Currently running Exchange SE and I need to update our Exchange Delegation Federation Certificate. I am seeing links and documentation that points to Exchange 2013 steps. Are these steps still valid for Exchange SE?

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-01-07T18:41:37.8166667+00:00
Jason Earhart 0 Reputation points
commented 2026-07-28T01:58:57.4666667+00:00
Anonymous
1 answer

change exchange storage limit

getting a message warning that email storage is full

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-07-24T15:12:42.85+00:00
office angelescollision 0 Reputation points
edited an answer 2026-07-24T19:36:38.77+00:00
Hin-V 16,830 Reputation points Microsoft External Staff Moderator
2 answers

I can't modify the members of a group in Exchange Admin Center

Message I received when I try to modify the members of a group: Failed to update members Error: Response Content is Null

Exchange | Exchange Server | Management
Exchange | Exchange Server | Management

The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.

8,199 questions
asked 2026-05-29T11:48:07.6766667+00:00
Alfieri, Lea 0 Reputation points
commented 2026-07-21T15:10:34.44+00:00
Murray, Emily 0 Reputation points