When I set up OneDrive for the first time, I get an error saying "You've exceeded the number of devices supported by OneDrive" and I can not sign in to OneDrive.
OneDrive has a "file acquisition function" that accesses files stored in different PCs. This is a function of accessing files in another PC via the OneDrive website, and the name of the signed-in PC is registered on the OneDrive website.When this registered PC exceeds a certain number, the message "You've exceeded the number of devices supported by OneDrive" is displayed.The upper limit is about 40-50 units. Although it rarely goes beyond the upper limit, since it will be recognized as a separate PC even after initializing Windows, repeating OS initialization may exceed the upper limit.
① Using a web browser, open the OneDrive Web site（https://onedrive.live.com/）and sign in.
② Click [PCs] from the menu on the left.
③ Since the list of PC names is displayed under the item of [PCs], click the PC name that you want to remove.
④ Click [Remove PC] in the right pane of the page.
⑤ When the confirmation message appears, click [Remove PC].
⑥ In the same procedure, remove other PC names.
The method of re-adding the removed PC name on the OneDrive Web site is as follows. (OneDrive App must be signed in with a Microsoft account.)
① Right-click on the OneDrive icon in the notification area, open it with the Settings -> Settings tab and tick "Let me use OneDrive to fetch any of my files on this PC".
② Press the OK button.