Digitally sign greyed out, worked 2 weeks ago :-(

[Happylife2689]

Trying to digitally sign a PDF doc. I was able to do this 2 weeks ago, but can't now.  I've tried using the trusted certificates (under tools) as well as "fill & sign" and both are greyed out and won't allow me to use them.

Screenshots provided of what version windows I'm using, etc.

Thanks in advance for your help

[Amal.]

Hi there

Hope you are doing well and sorry for the trouble. As described you are unable to sign the PDF file as the option is greyed out

- Is this a behavior with a particular PDF file or with all the PDFs? Please try with a different PDF file and check.

- If the file is stored on a shared network/drive, please download it to your computer locally and then open it with Acrobat Reader DC and check

- What is the version of the Acrobat Reader DC application you are using? To check the version go to Help > About Acrobat and make sure you have the latest version 21.01.20155 installed. Go to Help > Check for updates and reboot the computer once

If it still doesn't work, please reset the Acrobat Preferences to default as described in the help page - https://community.adobe.com/t5/acrobat/how-to-reset-acrobat-preference-settings-to-default/td-p/4792...  and check

You may also try to create a new test user profile in windows with full admin rights or enable the root account in Mac and try using the application there and check.

Regards

Amal