Thomas.Poett@TEAMS (MVP Teams and Cross-Tenant Migration Specialist)

How and when to decommission your on-premises Exchange servers in a hybrid deployment | Microsoft Learn I provide you the link and a simple answer But a lot BUT: Note It's recommended that you leave the Exchange Hybrid Deployment feature enabled in cloud sync or Microsoft Entra Connect.

This is an know bug within Teams. This issue is happening on desktop and mobile version only, if you had installed the Teams app before and changed / created a new Microsoft M365 Tenant with the same user name (UPN/ SIP) Solution: Uninstall Teams App Delete all Teams references and folders Reinstall Teams App Login normally

 Teams Federation isn't working. The Get-CsTenantFederationConfiguration will show the current settings of your federation setup. Nevertheless, if you are owner of an Microsoft TRIAL tenant, federation with other tenants isn't working automatically any longer. Microsoft had introduced an new parameter: -ExternalAccessWithTrialTenants "Blocked"  Therefore, all Microsoft Tenants have the new DEFUALT setting "Blocked" defined. Your partner organization must remove "ALLOW" the federation with you. This also impacts all Microsoft MVP Tenants with only MVP assigned licenses. Note a side: The RUN TEST diagnostic will provide you with false positives here: https://aka.ms/TeamsFederationDiag IT Admins - Manage external meetings and chat with people and organizations using Microsoft identities - Microsoft Teams | Microsoft Learn

Teams Export APIs allow you to export 1:1, group chat, meeting chats, and channel messages from Microsoft Teams. If your organization needs to export Microsoft Teams messages, you're able to extract them using Teams Export APIs. Export content with the Microsoft Teams Export APIs - Microsoft Teams | Microsoft Learn NOTE: You might need additional API Access License.

  If you want to do in deep Teams Client analysis, you need to download WebLogs from the active Teams client. This you can do by pressing the key phrase of CTRL (STRG on German Keyboard) + ALT + SHIFT + 1 The log files will be stored in your download folder. Happy analyzing ;)

 Teams Shared Channel without Tenant Switching An new feature to Microsoft Teams was introduced and makes cross-tenant collaboration much easier. The need of switching a tenant, gaining access to Shared Channel, were you are member of with your Guest Account is now obsolete. With B2B relationships between 2 tenants, the B2B Guest Account can be used within your own organization. This eliminates the tenant switching for efficient collaboration. This feature is available bi-directional. NOTE: with this shared channels, NO B2B Guest Account is needed . The trust relationship between those tenants involved, for Teams only (M365 Group with Teams enabled) accessing the SHARED CHANNEL ONLY in TEAMS based on the invite. Opponent users are found and identified based on the their UPN and Tenant ID Trust. The "embedded" Team Channel is marked with to identifiers: - @Contoso : this indicated, the Teams and its Channels are located outside of your organization and is naming the partner te...

Cross-Tenant Access Settings - Unable to find Tenant It might be happen that the name.onmmicrosoft.com or FQDN of the partner tenant isn't working. In this case you must use the ENTRA TENANT ID: Not Found: Found with ENTRA ID TENANT ID

Connecting with PowerShell to the Teams module. Often I'm asked: How to connect to Teams Module with PowerShell. If it fails with the message below, this is in Windows 10/11 the issues with Set-ExecutionPolicy. Set-ExecutionPolicy Unrestricted Required: PowerShell 5.1, .NET Framework 4.7.2 Install-Module -Name PowerShellGet -Force -AllowClobber Install-Module -Name MicrosoftTeams -Force -AllowClobber (or if installed: Import-Module PowerShellGet, Import-Module MirosoftTeams) Connect-MicrosoftTeam s

 If you need to build templates or compare tenant settings. e.g. if you need to identify discrepancies for a cross-tenant migration.  The PowerShell cmdlet  Export-M365DSCConfiguration   allows you to compare settings. Introduction - Microsoft365DSC - Your Cloud Configuration Microsoft365DSC - Configuration-as-Code for the Cloud # Generated by Microsoft365DSC from https://export.microsoft365dsc.com on 04/03/2024, 17:44:22 # Visit https://microsoft365dsc.com for more information # Getting client credential $Credential = Get-Credential # Exporting resources using credentials Export-M365DSCConfiguration -Components @("AADAdministrativeUnit", ......l

 NOTE: the core (during setup) language is set, defined and "burned-in" during your tenant setup. You CANNOT change the M365 Core language (the language the tenant was setup in). This impacts all users in your tenant. They will ALLWAYS receive notification in the language defined during SETUP. Meaning: If you have set FRENCH during setup and change to e.g. English or whatever else. System Messages like SharePoint Storage limit is reached will be in the setup default language. In this case here French! The Organizational Information setting below will not change the default language to users or admins. ! Be ware of the difference of "PREFERRED LANGUAGE" and the "CORE" language chosen during tenant setup! -> NOTE: always document the language during setup of a tenant ! You will are not able to see the core language. But in case of tool based cross-tenant migrations, e.g. with SharePoint, the library folder in a target tenant will appear in the source tena...

 It is an nightmare to solve this issue, put with a lot of patience you can solve it. Uninstall and reinstall everything on driver and firmware related to PEN and TOUCH . Procedue: 1. Surface Pen is paired on your Surface Pro open Device Manager 2. Click View on top and check Show hidden devices. 3. Expand Human Interface Devices category. Right click drivers and select Uninstall.  HID-compliant pen > Uninstall device Surface pen settings > Uninstall device Surface pen integration > Uninstall device HID-Compliant touch screen > Uninstall device Intel (R) Precise Touch Device > Uninstall device Surface Touch Pen Processor > Uninstall device Some have different names, but AGIAN uninstall EVERYTHING with PEN and TOUCH ! Note: If prompted with a checkbox stating, "Delete the driver software for this device", leave it uncheck then hit Uninstall. 4. Expand Firmware > Surface touch > Uninstall device Note: If prompted with a checkbox stating, "Delete the...

 This is a quick note and IMPORTNANT : Within a Cross-Tenant Migration project, you can experience data encryption. Note the following statement and plan accordingly. Legal-Hold: There is no possibility to migrate data (EXO, SPO, OneDrive) if the source is set on legal-hold Encrypted Data: It depends on the encryption method. Either AIP or user based. If it user based user@dnsdomain.com, the migration can work and with the resignment of the user@dnsdomain.com the encryption/decryption might work again. But while the DNS domain is with the source tenant, encrypted mails become unusable. With AIP, the only way is to decrypt in source, than migrate and encrypt in target again. Migrating a tenant AIP key is NOT possible

Microsoft is moving towards a new optimized collaboration and administration for organizations operating multiple M365 tenants. New Teams client is supporting this feature. Nevertheless, there are (today in public preview) limitations to MTO, which might be removed over time. Self-service of multitenant organization functionality is limited to a maximum of five tenants and 100,000 internal users per tenant. To request a raise in these limits, submit a Microsoft Entra ID or Microsoft 365 admin center support request. Further to me, it is NOT a real multi-tenant organization, as we know from earlier days in AD, where we had "SubDomains", it is based on automated B2B identities, which are provisioned as B2B users automatically. This is the sync feature in MTO. Below the extract from Microsoft blog release: Using shared channels for seamless cross-tenant collaboration and communication In a  recent blog , we shared how Microsoft Teams Connect enables seamless and secure collabora...