Error c1038a21 appears when you try to view properties of public folder system folder – Schedule + free busy or offline address book folder

Microsoft have a article on how to fix it , but in there guide they recommend usage of Information Store Viewer (MDBVu32).

I prefer to use PFDAVAdmin that can be downloaded from here it is much easier .

1. Run PFDAVAdmin
2. Press on file>connect
3. Fill your DC settings like on screenshot bellow (don’t forget to select public folders)
   
4. Navigate to problematic folder – schedule free busy for example
   
5. Right click on it and chose “property editor”
   
6. Select PRF_PF_PROXY from property dropdown
   mark clear and press execute.
   

That’s it, that should fix the problem.

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