Data factory add existing integrated runtime. Trying to create a shared self-hosted IR using Azure Data Factory UI. Grant permission to another Data factory or user-assigned managed identity. Documentation https://learn.microsoft.com/en-us/azure/data-factory/create-shared-self-hosted-integration-runtime-powershell
Integrated Runtime Error
After granting permission to another Data factory you get the following message.
Error code AuthorizationFailed The client * with object id * does not have authorization to perform action 'Microsoft.Authorization/roleAssignments/write' over scope '/subscriptions/*/resourcegroups/*/providers/Microsoft.DataFactory/factories/*/integrationRuntimes/*/providers/Microsoft.Authorization/roleAssignments/*' or the scope is invalid. If access was recently granted, please refresh your credentials.
This is a permission issue. Either you are not the owner or have enough permission to share the integrated runtime with another Data Factory. Either get more permission or login as the administrator to do it.