Hello Bart Kersten,
Welcome to the Microsoft Q&A and thank you for posting your questions here.
I understand that your local file upload option greyed out to add knowledge to Azure AI Agent in Foundry.
Since you're in Germany West Central, use the Vector Store method for grounding. It is fully supported, but even though Germany West Central is listed as a supported region for Azure AI Foundry projects, some features like file-based knowledge ingestion are still rolling out regionally. So, avoids Azure AI Search, and allows semantic search over your uploaded files. Other option is that you can use REST API to Upload Files to Vector Store. If UI is limited, use the REST API:
- Endpoint:
POST /aiagents/vector-store-files
and check these links for more details - https://learn.microsoft.com/en-us/rest/api/aifoundry/aiagents/vector-store-files/create-vector-store-file?view=rest-aifoundry-aiagents-v1 and https://learn.microsoft.com/en-us/azure/ai-foundry/agents/how-to/tools/file-search-upload-files
Also, if you need the “Files” tool (not Vector Store), migrate your agent to a supported region:
- The recommended regions are: East US, West Europe, UK South
You can read this link on Azure AI Foundry Region Support for more details - https://learn.microsoft.com/en-us/azure/ai-foundry/reference/region-support
I hope this is helpful! Do not hesitate to let me know if you have any other questions or clarifications.
Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful.