Recently my Microsoft Teams Desktop app started showing the error code caad0009 and I was unable to use the Teams app from thereon. This a rare sign-in error which indicates the service could not validate your credentials or recognize your
Microsoft ADFS 3.0 – Event ID 364 – No strong authentication method found for the request from

After upgrading the MFA component on our ADFS server it stopped working. Further investigation showed the following event ID error: Encountered error during federation passive request. Additional Data Protocol Name:Saml Relying Party:https://adfs.domain.com/saml/info Exception details:Microsoft.IdentityServer.Web.NoValidStrongAuthenticationMethodException: No strong authentication method found for
Microsoft Exchange 2016 – 454 4.7.5 The certificate specified in TlsCertificateName of the SendConnector could not be found

If the emails remain on the Exchange server and cannot be forwarded to the smarthost for sending, it may be because the certificate bound to the corresponding connector no longer exists or has been expired. Of course, it is also
Citrix XenDeskop 7.x – Printer auto-creation failure. Reason: AddPrinter() failed with status 0x7A
Today I came across an issue where printer auto creation failed for a couple of HP printers on one client computer only. The XenDesktop worker showed an Event ID 1106 stating Printer auto-creation failure. Reason: AddPrinter() failed with status 0x7A.
Windows Server 2016 ADFS v4.0 – Certain (non-admin) Users Cannot Login – no error, just plain login mask

Just recently I happened to face a pretty annoying issue, that took me a couple of hours to solve. And by the end it was quite simple and obvious actually. Long story short – newly implemented AD FS 4.0 farm,
Windows Server 2016 ADFS v4.0 – The specified service account ‘CN=svc-ADFS-gMSA’ did not exist. Attempt to create the group Managed Service Account failed. Error: There is no such object on the server.

While running the Active Directory Federation Services Configuration Wizard for the first time on a newly installed Windows Server 2016, I ran into the following error after deciding to create the first federation server in a federation server farm, and
Citrix License Server v12.x – How to renew an expired Apache Tomcat Server Certificate

Just recently I came across an expired Server Certificate on my Citrix License Server v12.x. As everybody might know, the Citrix License Server is based on an Apache Tomcat webserver running on your Windows Server. During installation a self-signed server
Citrix NetScaler ADC and ShareFile StorageZone Controller Setup – “The folder you are looking for could not be found” on ShareFile Web App while accessing Network shares

To help you set up NetScaler for ShareFile with on-premises storage zone controllers, an easy-to-use wizard is included in the GUI. The wizard prompts you for basic information about your StorageZones Controller environment and then generates a configuration that: Load
Exchange 2010 – Outlook 2010 OAB download failes with error 0x80190194 – A troubleshooting approach

Just recently I came across an interesting support case which involved an Exchange 2010 Offline Address Book (OAB) and Outlook 2010 clients trying to download it. The affected users received an error stating: Error 0x80190194 – The operation failed. Problem
Exchange 2016 – Migration of existing, custom Receive Connectors from Exchange 2010 to 2016 results in multiple errors

Another Exchange 2016 migration, another error while trying to migrate custom Receiver Connectors from Exchange 2010 to 2016 … an analysis.