Outlook Office365 Work Account Error 0xCAA70007

Outlook 365 0xCAA70007 error message connecting to onmicrosoft Office365 account: You'll need the internet for this 0xCAA70007

Hi,

I'm facing an issue with accessing my onmicrosoft Office365 account with outlook. Whenever I open outlook in windows it shows the prompt "You''ll need the internet for this". The message says we couldn't connect to one of the services we need you sign you in. Please check your connection and try again.

The error code is - 0xCAA70007

The outlook works fine in the browser and internet connection is working.

I tried repairing office and also removed outlook credentials.  I have also uninstalled office and now the client will not even load.  

How-I-fixed-it:

I found the solution to my problem in Microsofts answers:

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_win10-mso_o365b/youll-need-the-internet-for-this-0xcaa70007/a1d80f08-27b5-406c-8e07-a8e6bb8c2d1b

This is what I did:

• Shut down all Office Apps
• In Explorer, navigate to  C:\Users\%Username%\AppData\Local\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\AC\Microsoft\Crypto\TokenBindingKeys\Keys
• Delete the Keys in the folder
• Relaunch Outlook - Keys are re-created automatically.

Outlook signature has wrong colors / colors change on every save of signature / signature corrupt

I created a new HTML signature in Outlook 2016 and user a user defined color by RGB values.
I the signature editor everything looked OK, but when i first used the signature in an E-Mail i recognized, that one line in the signature was black colored instead of the color i wanted.

I went back to the signature editor and saw, that the issue was still present. I colored all lines the same and saved the signature. Using it for the first time, another line was black now. Tried this a few times and the problem did not go away.

How-I-fixed-it:

Where does Outlook store the signatures? (In german: Wo speichert Outlook die Signaturen ab?)
Outlook stores the signatures in your personal data directory (this is also important to know in case you want to backup or transfer your signatures), not in any pst-file!

I went to:
C:\Users\MyUserName\AppData\Roaming\Microsoft\Signatures

There you find some file with the name of your signature, one for every E-Mail-Format.
I opened the MySignatureName.htm file and after a huge part of styles and formatting right at the end i found the HTML-Code of my signature.
I found out, that for the line(s) being black instead of my color, Outlook added the
-Tag BEFORE the text instead of after it. So the style did not affect it.I manually corrected the HTML to be the way i wanted it to be and the problem seems to be gone now.

How to change the display nome of outlook.com account / ost-file in folder pane in Outlook 2013/2016

My outlook 2016 was showing my outlook.com account using my microsoft account e-mail address. I was looking for a way how to rename the "blabla@outlook.com" to "Outlook.com-Account", like i can be done with POP/IMAP accounts.
But the properties of the data file only showed me the path to the .ost-file, but no Textbox to enter a Display name.

How i fixed it:

I found the solution a Microsoft answers forum, posted by Verdhaham Shetti:

Here's his solution, which worked for me:

"Let's follow the steps to change the mail box name for EAS account.

1. Go to File > Options > Advanced > Click on Send/Receive…
2. Press the Edit.
3. Select your Outlook.com/Hotmail account on the left.
4. Press the Account Properties.
5. Type the display name for your account on the General tab.
6. Press OK until all dialogs are closed and you are back in the main Outlook window. "

Reference:

http://answers.microsoft.com/en-us/office/forum/office_2016-outlook/how-to-rename-mailbox-display-name-in-outlook-2016/4d63be01-acd5-4b31-b228-9c1a829a7182