CosmosDB emulator can't start since port is already in use

If you prefer just to change the Windows Shortcut, right click > properties and add /port=8082 (or whatever port number you want) at the end of the Target field after the quotes.

Note that in the Emulator Data Explorer, the URI field still showed the default port of 8081.

The CosmosDbEmulator comes with a PowerShell module, which you can use to control it.

To get started using the module run the following command:

 Import-Module "$env:ProgramFiles\Azure Cosmos DB Emulator\PSModules\Microsoft.Azure.CosmosDB.Emulator"

Start the CosmosDbEmulator on a port of your choice, e.g 8082 as follows:

Start-CosmosDbEmulator -port 8082

I finally got it working with powershell.

Import module

$env:PSModulesPath += "$env:ProgramFiles\Azure Cosmos DB Emulator\PSModules"
Import-Module Microsoft.Azure.CosmosDB.Emulator

Stop CosmosDB emulator

Stop-CosmosDbEmulator

Start CosmosDB emulator with prefered port

Start-CosmosDbEmulator  -Port 10101

And I got it working... Hope this helps.

Check your processes list and find one like Microsoft.Azure.Cosmos.GatewayService.exe. Kill it. Then I can start Cosmos emulator.

With the latest (2.14.3) that I installed today, you need to specify /mongoport instead of /port.