Migration of embedded images in work items

[gashupl]

Hi. I’m currently investigating the possibility of using Migration Tool for work items migration between 2 DevOps instances in different tenants. Everything is going smoothly however there is one point which is blocking me for achieving my goal.

The embedded images in work items descriptions and comments are not migrated. When I investigate image link in destination environment, I still see it is pointing out to the source environment image location.

Moreover, I can see the following errors in my migration log:

2023-03-29 09:09:37.274 +00:00 [ERR] EmbededImagesRepairEnricher: Unable to fix HTML field attachments for work item 0 from https://dev.azure.com/abc to https://dev.azure.com/xyz/
System.Net.Http.HttpRequestException: Response status code does not indicate success: 302 (Found).
at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode()
at MigrationTools.Enrichers.TfsEmbededImagesEnricher.UploadedAndRetrieveAttachmentLinkUrl(String matchedSourceUri, String sourceFieldName, WorkItemData targetWorkItem, String sourcePersonalAccessToken) in D:\a\1\s\src\MigrationTools.Clients.AzureDevops.ObjectModel\Enrichers\TfsEmbededImagesEnricher.cs:line 152
at MigrationTools.Enrichers.TfsEmbededImagesEnricher.FixEmbededImages(WorkItemData wi, String oldTfsurl, String newTfsurl, String sourcePersonalAccessToken) in D:\a\1\s\src\MigrationTools.Clients.AzureDevops.ObjectModel\Enrichers\TfsEmbededImagesEnricher.cs:line 98

Is it possible to migrate embedded images at all?
If so, how the configuration file should look like?

Any help will be appreciated.

[MrHinsh]

You MUST use a PAT token for both the target and the source for the image migration to work.

"Target": {
    "$type": "TfsTeamProjectConfig",
    "Collection": "https://dev.azure.com/nkdagility-preview/",
    "Project": "myProjectName",
    "ReflectedWorkItemIDFieldName": "Custom.ReflectedWorkItemId",
    "AllowCrossProjectLinking": false,
    "AuthenticationMode": "AccessToken",
    "PersonalAccessToken": "asdasdadgrgredfvsdgbdgjfgdhfgsdfsdgfsdgsfdhgfhd",
    "PersonalAccessTokenVariableName": "",
    "LanguageMaps": {
      "AreaPath": "Area",
      "IterationPath": "Iteration"
    }
  },

Then set FixHtmlAttachmentLinks to true in the WorkItemMigrationConfig processor.

[gashupl]

Hmmm... I will need to do some more testing but for some dummy data I've prepared - it looks attachement's migration is working correctly when AuthenticationMode is "AccessToken" and not a "Prompt" one.
Many thanks for your help. Best regards!