How to Fix Office 365 Pro Plus Error CAA50021: Device Registration Issue

How to Fix Офіс 365 Pro Plus Помилка CAA50021: Device Registration Issue. This помилка may occur in any Офіс 365 Pro Plus desktop application.

We weren`t able to register your device and add your account to Windows. Your access to org resources may be limited.

Solution 1 Командний рядок (CMD)

Better use the command prompt because вікна PowerShell does not understand %ProgramFiles(x86)% in command. But the solution can be completed in both CMD and PowerShell.

1. бігти Командний рядок або PowerShell

2. At appeared Командний рядок application right mouse button click and select Запустіть від імені адміністратора;

3. Type the following command:

cscript.exe "%ProgramFiles(x86)%\Microsoft Office\Office16\ospp.vbs" /dstatus

4. After that, you get some information about Office installation and:

Last 5 characters of installed product key: XXXXX

5. Type the following command, where XXXXX – your last 5 characters of the installed product key:

cscript.exe "%ProgramFiles(x86)%\Microsoft Office\Office16\ospp.vbs" /unpkey:XXXXX

Solution 2 (Windows PowerShell)

1. Right Mouse button click on the Start кнопку і біжіть вікна PowerShell (адмін);

2. Type the following command:

cscript.exe "C:\Program Files (x86)\Microsoft Office\Office16\ospp.vbs" /dstatus

3. After that, you get some information about Office installation and:

Last 5 characters of installed product key: XXXXX

4. Type the following command, where XXXXX – your last 5 characters of the installed product key:

cscript.exe "C:\Program Files (x86)\Microsoft Office\Office16\ospp.vbs" /unpkey:XXXXX

Solution 3 (Registry Editor)

Change Registry to disable modern authentication for office applications.

1. Click on Почніть button and type:

regedit

2. At appeared Registry Editor application right mouse button click and select Запустіть від імені адміністратора;

3. Перейдіть до:

HKCU\SOFTWARE\Microsoft\Office\16.0\Common\Identity\

4. And set key EnableADAL REG_DWORD to Value: 0