This article was created in response to a support issue logged with K2. The content may include typographical errors and may be revised at any time without notice This article is not considered official documentation for K2 software and is provided “as is” with no warranties.


An issue appears when using the Mobile App.  It is possible to log in via AAD account, but you are unable to download a Task List.

The following error appears:

ERROR/Network Requests: Task List Download Failed, An error has occured

The following error also appeared on elmah logs:

28026 K2:Domain\User does not have permissions to impersonate user AAD:User.....


The user account didn't have impersonate rights or permissions to download the task list.

Troubleshooting Steps

The user does not need any administrator rights, but the user needs to be assigned impersonation rights for all AAD users, which can be configured in K2.