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Azure DevOps - Delete an existing collection

 After a failed Azure DevOps migration, I ended up with an unusable collection on our Azure DevOps server. 

I had a look at the Azure DevOps administration console but couldn't find a way to delete the collection.

Luckily there is still the command line; I was able to do it through the tfsconfig tool:

D:\Program Files\Azure DevOps Server 2020\Tools>tfsconfig collection /delete /collectionName:FailedCollection 

Logging sent to file C:\ProgramData\Microsoft\Azure DevOps\Server Configuration\Logs\CFG_TPC_AT_0129_130947.log 

TfsConfig - Azure DevOps Server Configuration Tool Copyright (c) Microsoft Corporation. All rights reserved. 

Command:collection 

TfsConfig -Azure DevOps Server Configuration Tool Copyright (c) Microsoft Corporation. All rights reserved. 

Deleting a Team Project Collection is an irreversible operation. A deleted collection can not be reattached to the same or another Azure DevOps Server. Are you sure you want to delete 'FailedCollection'? (Yes/No) Y
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