'Something went wrong. 5ssai.

Guys,

I found the solution. I think that Microsoft screwed with the 2FA and this has caused Android devices to be untrusted and that a trust relationship must be reestablished in order for the new Auth procedures to work. Typical Microsoft whoopsie. Mass production not validating and testing their code prior to deploying to the public..

Pre-Requisite. Microsoft Authenticator is installed on your device and that your Outlook account is linked to it

Remove the Errant account from the list of accounts in Outlook and the Native Email app

1. On your Android device.

• Go to Settings
• Apps
• Look for Outlook
• Click Storage
• Click "Clear Cache on the bottom righthand side of the screen.
• Open a web browser and navigate to outlook.office.com
• Enter your email and your password.
• Authenticator will then go thru its 2FA method and ask for the Auth number as displayed on the sign in. Enter the

number displayed

You should now see why the error came up.  Your device is not a trusted device and a question will be asked..Trust the device?  Click Yes

and once everything is lined up, you will see the Welcome to Copilot and your webmail.

• Now open your Outlook app and re-add the errant account. Click Add account select O365 Enter the email account Enter the password Outlook will now re-add the email account successfully.
• Now do the same thing with your Native Mail app

Everything should now work.

If after this, your email is still showing that 5ssai error then consult with your provider ot Systems Administrator for further analysis but this solution should help you guys out.

A bug in the Android system leads to a 5ssai error when trying to log in with some MS365 email accounts.

Clearing the cache or uninstalling the Outlook application will not help.

You need to add the account through Settings on your Android phone > Accounts and backup > Manage accounts > then Add account, pick Outlook, and insert account credentials.

Same here. Tried all posted solutions with no success.

Some new info:

1. I had this problem with a new Samsung phone. The old Samsung phone works fine
2. Some additional text to the error as follows:

**Message:**The operation attempted is invalid.

**Tag:**5ssai

**Code:**884576759

Any help appreciated.

Same here. Tried all posted solutions with no success.

Some new info:

1. I had this problem with a new Samsung phone. The old Samsung phone works fine
2. Some additional text to the error as follows:

**Message:**The operation attempted is invalid.

**Tag:**5ssai

**Code:**884576759

Any help appreciated.

Here was my reply to the thread.

Guys,

I found the solution. I think that Microsoft screwed with the 2FA and this has caused Android devices to be untrusted and that a trust relationship must be reestablished in order for the new Auth procedures to work. Typical Microsoft whoopsie. Mass production not validating and testing their code prior to deploying to the public..

Pre-Requisite. Microsoft Authenticator is installed on your device and that your Outlook account is linked to it

Remove the Errant account from the list of accounts in Outlook and the Native Email app

1. On your Android device.

• Go to Settings
• Apps
• Look for Outlook
• Click Storage
• Click "Clear Cache on the bottom righthand side of the screen.
• Open a web browser and navigate to outlook.office.com
• Enter your email and your password.
• Authenticator will then go thru its 2FA method and ask for the Auth number as displayed on the sign in. Enter the

number displayed

You should now see why the error came up. Your device is not a trusted device and a question will be asked..Trust the device? Click Yes

and once everything is lined up, you will see the Welcome to Copilot and your webmail.

• Now open your Outlook app and re-add the errant account.

Click Add account

select O365

Enter the email account

Enter the password

Outlook will now re-add the email account successfully.

• Now do the same thing with your Native Mail app

Everything should now work.

If after this, your email is still showing that 5ssai error then consult with your provider ot Systems Administrator for further analysis but this solution should help you guys out.

Hello Annette Buckle,
  

Good day! Thank you for posting in the community.

The error message "Something went wrong. 5ssai" typically indicates a problem with account authentication or security settings in Microsoft 365 on your Android device.

1. Please share your account and subscription details via private message.
2. Have you recently made any changes to your email account, such as updating your password or modifying security settings?
3. Have you tried restarting your phone and then accessing the email account again?
4. Have you tried clearing the app cache and then accessing the account again?
   • Go to Settings > Apps > Outlook
   • Tap on Storage > Clear Cache.
5. Please attempt to log into your account from Outlook on the web (outlook.office.com) using your browser and let me know if you can access your account.
6. Have you checked for updates to the Outlook application on your device? If so, please share the version currently installed on your Android device.
7. Are you able to access your email account from another mobile device?

Note: According to the forum policy, in order to protect sensitive information, please share the requested information with me in "View Private Messages".

Here are the steps to enable the display of private messages:

 

To display the private message option> sign in to the Microsoft Community, use your email account where you posted this topic in the Microsoft Community, click the > profile picture in the upper-right corner, > select the My Profile option.

![Image](https://learn-attachment.microsoft.com/api/attachments/e368ef4b-2cbc-4e1b-905e-ce88ae4769ea?platform=QnA"https://learn-attachment.microsoft.com/api/attachments/966bf9e4-96ce-44c1-ac9b-80b76f915c5a?platform=QnA" title="filestore.community.support.microsoft.com" rel="ugc nofollow">

I'll wait for your next update in a private message. I will give you more information accordingly.

Your valuable cooperation will be greatly appreciated in the community.

Hello Microsoft Team

i am having the same issues tyrying to add my email account and Office 365 to a new Android tablet, i am getting the same message "something went wrong 5ssai. I have tried everything, nothing is working, please help

Here was my reply to the thread.

Guys,

I found the solution. I think that Microsoft screwed with the 2FA and this has caused Android devices to be untrusted and that a trust relationship must be reestablished in order for the new Auth procedures to work. Typical Microsoft whoopsie. Mass production not validating and testing their code prior to deploying to the public..

Pre-Requisite. Microsoft Authenticator is installed on your device and that your Outlook account is linked to it

Remove the Errant account from the list of accounts in Outlook and the Native Email app

1. On your Android device.

• Go to Settings
• Apps
• Look for Outlook
• Click Storage
• Click "Clear Cache on the bottom righthand side of the screen.
• Open a web browser and navigate to outlook.office.com
• Enter your email and your password.
• Authenticator will then go thru its 2FA method and ask for the Auth number as displayed on the sign in. Enter the

number displayed

You should now see why the error came up. Your device is not a trusted device and a question will be asked..Trust the device? Click Yes

and once everything is lined up, you will see the Welcome to Copilot and your webmail.

• Now open your Outlook app and re-add the errant account.

Click Add account

select O365

Enter the email account

Enter the password

Outlook will now re-add the email account successfully.

• Now do the same thing with your Native Mail app

Everything should now work.

If after this, your email is still showing that 5ssai error then consult with your provider ot Systems Administrator for further analysis but this solution should help you guys out.