I am Macbook pro user. (macOS BigSur Version 11.2.3) When I connect to CRM Sharepoint through https:// all the Microsoft Office files are open, copy, modify and save but pdf files are not. I can see all the pdf files in folder but when I click on it, receive the following message. "The file “xxxxxxxx.pdf” could not be opened. It may be damaged or use a file format that Preview doesn’t recognize." I try this with many alternative pdf reader application but the result is same. Also, when I try to copy it to my mac it gives the following message. "The Finder can’t complete the operation because some data in “xxxxxxxx.pdf” can’t be read or written. (Error code -36)" PDF files are copying to my mac but it gives the same error. I would be appreciated if someone can show the solution. Thanks