
Hi @Mohamed sewaif,
I tested according to the steps you provided above. I would like to ask what Edge extension you use? When I used PDF Add-on ("Adobe Acrobat") to test the digital signature function, although I clicked the "Save" button, unfortunately the signature was not saved successfully. In fact, this is already a problem caused by the "Adobe Acrobat" extension, which is not controlled by Edge. So, I suggest that you should submit feedback to the vendor of the extension you use.
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Best Regards,
Jinxin Wang