Just trying to verify that this bug is reproducible. My team has lost documents because of this critical save-as bug in Powerpoint for Mac Version 15. 13. 1 (2016).
Here is a link to a video that outlines the issue/bug.
Video demonstrates a catastrophic bug using the Save-As command in Microsoft Powerpoint for Mac Version 15.13.1 wherein Powerpoint is unable to overwrite/replace the open file and will discard and remove the file from its directory destructively if not re-saved
before closing the document. This bug appears to be isolated to network volumes/shares in my testing and is not reproduced on local volumes. Apologies in advance for the **** audio.
Steps to Reproduce in Microsoft Powerpoint for Mac Version 15.13.1 (again only occurs with network volumes AFP and SMB share in my testing)
1. File - New Presentation
2. File - Save (Saving to a network volume)
3. File - Save-As (Saving to same network volume location with the intent of overwriting original presentation.
4. File - Close (File will be deleted from network volume directory).