'Issue with Migrator Validation command

I am running the migrator tool to validate a collection. It completes and then errors out. Looking for help on the error:

Execution Time: 0:00:27.6966038 Output Folder: C:\ Collection - Name\20210527_142408

Support for importing from Azure DevOps Server 2019 Update 1.1 has been removed. If you're currently on Azure DevOps Server 2019 Update 1.1, you will need to upgrade your on-premises server to Azure DevOps Server 2020 or Azure DevOps Server 2020.0.1

Unhandled Exception: System.ArgumentNullException: Value cannot be null. Parameter name: tenantName at Microsoft.VisualStudio.Services.Common.ArgumentUtility.CheckStringForNullOrEmpty(String stringVar, String stringVarName, Boolean trim, String expectedServiceArea) at Microsoft.VisualStudio.Services.Identity.Import.IdentityImportValidation.GetAadIdentityMapper(DataImportValidationContext context, String tenantName) at TfsMigrator.TfsMigratorCommandValidate.RunValidations(Boolean requireNetwork, Boolean validateFiles) at TfsMigrator.TfsMigratorCommandValidate.RunImpl() at TfsMigrator.TfsMigratorCommand.Run() at Microsoft.VisualStudio.Services.CommandLine.CommandLine.RunCommand(String commandName, String[] args, Boolean& showExitCode) at Microsoft.VisualStudio.Services.CommandLine.CommandLine.RunCommand(String[] args) at Microsoft.VisualStudio.Services.CommandLine.CommandLine.Run(String[]& args) at TfsMigrator.TfsMigratorCommandLine.Main(String[] args)

Any help appreciated!



Solution 1:[1]

I can share a fix which helped us, but it might be a specific scenario fix. After the upgrade from Azure DevOps 2020.1 to 2020.1.1 (patch 4), this error has started to occur when running Migrator.exe validate. Fix was to add parameter (which was used only when running the "prepare" option):

Migrator.exe validate /collection:https://PathToADO/CollectionName /tenantDomainName:YourDomainName.onmicrosoft.com

Solution 2:[2]

The error said you need to upgrade your on-premises server to Azure DevOps Server 2020 or Azure DevOps Server 2020.0.1 first. Please try upgrading your on-premises server.

Support for importing from Azure DevOps Server 2019 Update 1.1 has been removed. If you're currently on Azure DevOps Server 2019 Update 1.1, you will need to upgrade your on-premises server to Azure DevOps Server 2020 or Azure DevOps Server 2020.0.1

Sources

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Source: Stack Overflow

Solution Source
Solution 1 ldl
Solution 2 Levi Lu-MSFT