Documents disappeared from computer after turning off iCloud

If you open system preferences , click on iCloud - in iCloud Drive click on option button and click on turn off and click on done .

In the next window , click on remove from Mac .

again in the upcoming window click on show in finder .

Yes the documents that you created with Microsoft office will be deleted from the Mac , but they are still saved on I cloud server , for this open www.icloud.com by entering your Apple ID and password , click on i cloud drive , you can tap the folder created with Microsoft office and click on download button , if there are multiple of them you can download also them.

Open finder , click on download button , select them and drag and drop over the iCloud Drive folder , yes this process will take hours to sync as the data is massive and the high network speed is essential .

You have to click on download icon as shown in the screen shot and a pie chart will rotate , after some time the documents will saved in iCloud Drive .See this article Get file, folder and disk information on Mac - Apple Support

also the photo will get synced , if the box of photos is checked , click on option button and these boxes are checked as per screen shot .

And about your client folders , website data it depends in which format were they created using Microsoft office or other software that are compatible with Mac also a point is to be considered what iCloud storage you used , is it free 5gb or exceeded the limits .