Powerpoint Master Templates Disappearing

Hello,

Welcome to the Microsoft Community Forum. Please accept our warmest regards and sincerest hope that all is well despite the situation you find yourself in.

Yes, this issue has been reported by other users—it seems that PowerPoint Master Templates sometimes disappear unexpectedly when saving.

Possible Causes & Fixes:

1. Check File Format – If you're saving in .pptx, try saving as a PowerPoint Template (.potx) instead.
2. Disable AutoSave – Some users have found that AutoSave can cause unexpected template changes. Try turning it off.
3. Use "Save As" Instead of Overwriting – Instead of saving over an existing file, use File > Save As to create a new version.
4. Repair Office Installation – Go to Control Panel > Programs > Microsoft Office > Modify, then select Repair.
5. Check for Updates – Ensure PowerPoint is fully updated, as Microsoft may have released a fix.
6. Test on Another Device – If possible, try opening the file on another computer to see if the issue persists.

Hope this helps.

Best Regards,

Fordy B.

Microsoft Community Moderator

Appreciate all of the feedback and your help.

Some context.... I am a graphic designer for my organisation and I was building templates for our staff use.

"the issue you have raised to us is still on-going" - I assume so failing toggling the preserve master flag. See the problem is that I expected that PowerPoint would not delete my work without a prompt with the result being an uncoverable one.

"try saving as a PowerPoint Template (.potx) instead" - does not make a difference to the functionality of the app and the problem persists.

"Disable AutoSave" - for me I lost work trying this method as the deletion occurs before the save... deletes then saves.

"Use "Save As" Instead of Overwriting' - is a work around not a solution. This will work to recover a back up but any subsequent work is lost. The unpredictable nature of the app to purge masters makes this method untenable.

"Repair Office Installation" - this is a work computer and I do not have admin rights to this functionality. As we outsource our IT this will probably cost us $200+ as a fix.

"Check for Updates" - did not know this was a thing. We have a tenant license for Microsoft 365 and I assumed this will happen discretely or clearly notified like the Windows updates. I haven't tested since I updated.

"Test on Another Device" - I haven't attempted this.

My approach was to split the many masters, I had 20, into separate template files. This seemed to lessen the amount of deletions ppt would do and made for any loss tolerable.

Hi,

We have noticed that you  have not replied to our last response. We would like to know if the issue you have raised to us is still on-going. If yes, please reply to the thread so we can continue troubleshooting your concern.

Regards,

Fordy B.

Microsoft Moderator

Eli,

Please see (and follow) John Korchok's advice before reading Fordy's reply.

The latter might be correct in some cases, the former is gold.