Exchange - Duplicated "Exchange Delegation Federation" certificates
Recently, I encountered an interesting scenario in which an "Exchange Delegation Federation" certificate on one of our Exchange servers appeared to be duplicated.
exchange
Exchange - Free up space removing old versions of OWA
Managing your Exchange Server efficiently is crucial for optimizing storage space. It's not uncommon for the "Owa\prem" folder to accumulate
Exchange - A reboot from a previous installation is pending
When updating Exchange you probably con come across the following error in the prerequisite analysis:
A reboot from a previous installation is pending
The way
Powershell - Could not create SSL/TLS secure channel
I use Powershell to send monitoring results to the Icinga API (passive checks). For example, to check if the Exchange backups were processed correctly, I
Exchange - Bulk import of distribution group members from csv
A short but useful post:
Suppose you need to import hundreds of members to a distribution group.
The list is in a CSV file:
Name,
Exchange - Update to fix escalation privilege vulnerability
Due to the vulnerability that allows privilege escalation I wrote about in this post, Microsoft has released a cumulative update for all supported versions of
Exchange - New vulnerability that allows privilege escalation
A new vulnerability that affects Exchange on-premise servers has been discovered recently (https://dirkjanm.io/abusing-exchange-one-api-call-away-from-domain-admin/). By making use of the high privileges Exchange servers
Exchange - Message queue file mail.que large size
Symptom: Large mail.que file size
Last week my Icinga started alerting about low free space in my Exchange server disk.
After using a software
Exchange - Cannot remove exchange certificate
Some days ago I tried to cleanup old certificates from my Exchange servers, but I received the following error:
[PS] C:\> Remove-ExchangeCertificate -Thumbprint D09EDD6D5F18C175254AB97046AAAAAAAAAAAAA
Exchange 2013 - Cumulative Update 21 released
In June 2018 Microsoft released Cumulative Update 21 (build 15.00.1395.004) which is the last planned quarterly update for Exchange 2013 (https://blogs.
Windows - .NET Framework 4.7.1 install stuck / hangs
I needed to install .NET 4.7.1 to allow updating Exchange 2013 to CU 21.
This is the installer I downloaded and tried to
Exchange - Setting automatic completion time for Mailbox Move Request
When performing mailbox migrations using the New-MoveRequest, the movement is performed online while the user is using the mailbox without suffering outage until the end.
Exchange - Mailbox folders permissions to other users
A user asked me the way to grant permissions to other users to access to some of his mailbox folders. And for certain folder only
Exchange - SMTP error: 550 5.7.1 Client does not have permissions to send as this sender
Problem
Last week I was testing the IMAP/SMTP connection of my Exchange 2013. Unexpectedly Outlook returned the following error:
The message does not appear
Exchange 2013 - IMAP NTLM authentication error
Exchange 2013 can produce IMAP issues when trying to authenticate. This is a known bug in CU9 and CU10 but in my CU12 scenario also