E-Mail – Exchange
Operational
The Exchange server operated by the LRZ provides e-mail services to the university, including mailboxes, distribution lists and calendars.
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There are currently no issues or notifications. This service is operating normally.
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Do you want to open the detail page for issue ""?Resolved issues
Outlook and OWA cannot be opened separately
Disrupted – Resolved after 3h 27m
At the moment there are some incident in the mail services. Outlook and OWA cannot partially open or sync any new content.
We are already in exchange with the LRZ to resolve the problem as soon as possible.
Migration Student mailboxes - delivery in old mailbox
Disrupted – Resolved after 3d 20h 5m
**UPDATE 02.04.26 * *
The problem has been fixed. You will now receive all messages in your new mailbox. Please check that you have not missed any important messages via https://xmail.mwn.de.
RESPONSIBILITY 31.03.2026* *
In the course of migration, there is a delay on the part of the LRZ. This means that some emails will continue to be delivered in the old mailbox. Please check your old mailbox at https://xmail.mwn.de to avoid missing important messages. You will be informed separately as soon as the delay is fixed.
Migration Student mailboxes to Exchange Online
Maintenance – Resolved after 5d 8h 31m
*The migration of student mailboxes to Microsoft Exchange Online takes place. *
**Update 05.04.26, 09:30 * *
The migration of the mailbox contents is completed.
**Update 04.04.26, 15:11am * *
The migration of the mailbox contents has begun. !
**Update 31.03.26, 13:00 * *
The HM app is changed. . Please log in from the old mailbox first and then with your HM Microsoft account.
**Update 31.03.26, 12:00 * *
The HM app will be changed shortly.
**original notification * *
There can currently be too short delays when sending and receiving emails. Access by students to your mailboxes may be temporarily restricted.
Deleted: Display Problems in Umlauten
Disrupted – Resolved after 42d 16h 47m
**
Fixed the problem with the Outlook updates from March 10, 2026. Update Outlook to one of the following versions. If you have a device managed by HM IT, this update will be automatically installed.
- Version 2601 19628.20252
- Version 2602 19725.20164
- Version 2603 19822.20032
UPDATE 15.02.2026:
If you are affected by this problem, Microsoft recommends the following steps to create temporary remedy.
1. Select in Outlook File > Options > Advanced. Two. Select *Coding for outgoing messages automatically under International Options. *
RESPONSIBILITY **
Currently, it may happen to individual users that umlaute (ä, ö, ü, ß) are not displayed correctly in Outlook emails and instead appear as question mark (?). This can occur in both sent and received emails.