If you’re using Microsoft Booking in your Microsoft 365 Tenant, you might want to list all of the Booking calendars. Booking uses Exchange Online Mailboxes in the background. Every Booking Calendar has a corresponding Mailbox of the type “SchedulingMailbox”. If an user gets assigned “Administrator” for a Booking Calendar, they get “FullAccess” permissions for the Scheduling Mailbox. List all Booking Calendars with permission I wrote a PowerShell script to list all the Booking Mailboxes with the users that have access....

If you have Auto-Expanding Archives for Exchange Online Mailboxes enabled, you might want to find out, if it actually provisions additional storage. In the Exchange Admin Center (EAC), open the info pane of the user’s mailbox. Click on “Manage mailbox archive”. An Auto-Expanding Archive provisions more Archive storage space, if needed. Default Archives have 100 GB of storage available. If the archive is already bigger than 100 GB, we must have additional storage....

After creating SimpleIP.de as a serverless application (see my blog post My simple serverless journey was not that easy) I was kinda proud. Interesting technology, small and useful website. Nice. Reality But after a while reality kicked in. I was playing around with some IPv6 systems, when it hit me. With the previous design, the site would show only the primary IP-Address of the client. If the client supports both IPv6 and IPv4, it would still only show one IP-Address....

A short example for PowerShell Regular Expressions. Scenario: Match filenames like ID1234_MyDocumentXYZ.pdf.lnk. We want go get the number after ID and the rest of the filename between the underscore _ and the file extension .lnk. 1 2 3 4 5 $oldLink = "ID1337_MyDocumentXYZ.pdf.lnk" if($oldLink -match 'ID(?<id>\d+)_(?<actualFilename>.+)\.lnk$') { Write-Output "ID: $($Matches.id)" Write-Output "Actual Filename: $($Matches.actualFilename)" } (?<id>\d+) is a named regex capture group (initialized by ?<groupname>). The group matches any numeric character (\d)....

More ore less quick note for myself - on how to run a PowerShell Script using Windows Task Scheduler. Open Task Scheduler A quick way to open Task Scheduler: WIN + R, then run taskschd.msc. Create New Task Open “Task Scheduler Library” → “Create New Task”. Set all the self-explanatory options like Name, Description, User Account, Triggers, etc. Set Action Setting Value Action Start a program Program/script powershell.exe Add arguments (optional) -file "C:\Path\Script....

You can using Microsoft Teams Audio Conferencing licenses to get Dial-In phone numbers for your meetings. The license is needed per user that creates the meeting invites. The phone number in the meeting invite is based on the UsageLocation attribute of the user - once when the user gets enabled for Audio Conferencing. So even if you fix a wrong UsageLocation, the user will still have the old dial-in number assigned....

The upgrade process from Skype for Business Online to Microsoft Teams is a disaster. I had several SMB clients reporting unnecessary errors regarding Teams/Skype. With unnecessary I mean: They had no issues using Teams until 2021-07-31. Issue: Suddenly Skype Meetings are back in Outlook mobile One client reported, that they suddenly have Skype Meetings in Outlook on iOS again, instead of Teams Meetings. That particular client manages their Microsoft 365 tenant themselves....

I’ve been looking for a way to retrieve the Timezone setting of a Sharepoint Online Site via PowerShell. Apparently there is not much good info publicly available. I looked for a way to use with the standard SPO PowerShell module named Microsoft.Online.SharePoint.PowerShell. There are some infos online about using the PNPOnline Module, but that was not practical in my case. There are even some really annoying articles out, that claim to to provide a PowerShell way....

If you’re asking yourself “How long are deleted Teams channels retained?” or “For how long can I restore a deleted Teams channel?” you can find the answer relatively quick. But mostly the original source in the Microsoft documentation is missing. Answer Deleted Microsoft Teams Channels are retained for 30 days. Official Source In https://docs.microsoft.com/en-us/microsoftteams/limits-specifications-teams#teams-and-channels under the table Teams and channels in footnote 4 it’s stated: Deleted channels can be restored within 30 days....

I created a PowerShell script to automatically deploy an Azure NAT-Gateway into an Azure Virtual Desktop environment. That’s useful, if you to need one static IP-Address for your AVD machines. I created the script as a submission for the Nerdio Hackathon 2021. My first Hackathon attendance :^). Update 2021-10-05 - I actually won first place, but apparently not many people participated in the contest. The Nerdio team are a bit disappointed, so they didn’t publish any announcements....