Resources available for creating accessible Microsoft documents and presentations:
Make Word documents accessible
Automated testing of MS Word documents
Checklist for Office documents
Check the accessibility of Microsoft documents
Creating Accessible PDFs
Automated Testing of PDF documents
Checking the accessibility of PDF documents
You will need Adobe Acrobat or Acrobat Pro for this process. Adobe Acrobat and Acrobat Pro can be requested here
Other resources for creating accessible PDFs
The Ultimate Guide to Accessible PDFs (LinkedIn Learning)
Creating Accessible PDFs (MyLinc)