Sign-in & Login Problems

How to Fix the Adobe Acrobat Sign-In and Thank-You Loop

Aamir Naveed Akram Oct 22, 2026 868 views

Question details

The user needs to resolve an authentication issue where Adobe Acrobat continuously loops between login and confirmation screens.

How to Fix the Adobe Acrobat Sign-In and Thank-You Loop

Product: Adobe Acrobat
Device & OS: Windows and macOS
Scenario: Attempting to launch and sign into Adobe Acrobat to access and edit PDF documents.
Observed behavior: The application repeatedly alternates between the 'Sign In' window and a 'Thank You' window without granting access to the software, despite having a valid Creative Cloud subscription.

Before you start

Ensure you have your Adobe ID credentials ready and completely close all running Adobe applications, including background processes, before modifying any licensing folders.

Solution 1Recommended

Clear Corrupted Adobe Licensing and OOBE Folders

Removing the corrupted cache and licensing files forces Acrobat to generate fresh sign-in files, successfully breaking the authentication loop.

The most common cause of the sign-in loop is corrupted data within the local Adobe licensing directories. Deleting these specific folders will safely reset the local login state without uninstalling your applications.

Close Adobe Applications

Ensure Adobe Acrobat and the Adobe Creative Cloud desktop app are completely closed. Use Task Manager (Windows) or Activity Monitor (Mac) to end any running Adobe background processes.

Locate the Adobe AppData Folder (Windows)

Press Win + R, type '%localappdata%\Adobe' in the Run dialog, and press Enter. If you cannot see the folder, click the 'View' tab in File Explorer and check the 'Hidden items' box.

Locate the Adobe Application Support Folder (Mac)

Open Finder, click 'Go' in the top menu bar, select 'Go to Folder', type '~/Library/Application Support/Adobe', and press Return.

Delete the Target Folders

Find the folders named 'MBLStore' and 'OOBE' in the Adobe directory. Right-click both folders and select 'Delete' (or move them to the Trash).

Relaunch and Sign In

Open Adobe Acrobat again. You will be prompted to go through the initial launch process and sign in with your Adobe ID. The loop should now be resolved.

Clear Corrupted Adobe Licensing and OOBE Folders

Safe Deletion: Deleting the OOBE and MBLStore folders will not remove your Adobe applications or personal files. These folders will automatically be recreated the next time you sign in.

Solution 2

Adjust Network Security and Firewall Settings

Overly strict firewalls, proxy settings, or anti-malware programs can block communication with Adobe's authentication servers, causing the software to loop.

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Frequently Asked Questions

Why does my Adobe Acrobat keep asking me to sign in?

This typically happens when local licensing files (such as the OOBE or MBLStore folders) become corrupted, or if a network firewall is blocking the application from securely communicating with Adobe's authentication servers.

Will deleting the OOBE folder uninstall my Adobe apps?

No, the OOBE folder only stores temporary licensing and sign-in cache data. Deleting it simply forces Adobe Creative Cloud and Acrobat to prompt you for a fresh sign-in without affecting any installed applications.

How do I find hidden folders in Windows to delete the Adobe cache?

Open File Explorer, click on the 'View' tab at the top of the window, and check the box that says 'Hidden items'. This allows you to navigate into the hidden AppData folder to locate the required Adobe directories.

Can I edit PDFs if I cannot sign into Acrobat?

If you are locked out of Adobe Acrobat due to a sign-in loop, you can use alternative software like the WPS Office PDF editor to quickly view, edit, annotate, and convert your PDF files without needing an Adobe login.

Login & Account Issues