Issue

One of the Sharepoint sites hosted on Office 365 suddenly became unavailable. When browsing to the site in Microsoft Edge, the following error is displayed:

Hmmm... can't reach this page
It looks like the webpage at https://company-name.sharepoint.com/sites/Sales might be having issues or it may have moved permanently to a new web address.
ERR_INVALID_RESPONSE

Read more: Can't access SharePoint site - ERR_INVALID_RESPONSE

Issue

Users reporting that some incoming emails sent to their Office 365 mailboxes never reach them and don't even appear in Junk Mail folders.

Resolution

A quick Office 365 message trace revealed that emails in question were sent to Office 365 Quarantine.

The quarantine can be accessed here and an admin can preview, download, or release the quarantined messages. As the screenshot below shows, the emails were sent to quarantine instead of the user's Junk Mail folder, because Office 365 Anti-Spam Policy identified them as High Confidence Phish (which was incorrect, the emails were completely legitimate text emails containing a single job sheet type PDF attachment).

Read more: Office 365 - disappearing incoming emails (sent to quarantine)

Issue

.co.uk domain transferred to 123-Reg from another domain registrar. The transfer has successfully completed and the domain now appears in the 123-Reg control panel. However, every time trying to get into Manage your DNS section of the portal produces the following error:

Error!
DNS record not available
The domain you have submitted is not available in your account, please try again.

Read more: 123-Reg - DNS record not available

Issue

Emails forwarded to external addresses from MS Office 365 Exchange mailboxes no longer get forwarded. Instead, the following bounce message goes back to users' mailbox:

Delivery has failed to these recipients or groups:
Name (email)
Your message wasn't delivered because the recipient's email provider rejected it.
Diagnostic information for administrators:
Remote Server returned '550 5.7.520 Access denied, Your organization does not allow external forwarding. Please contact your administrator for further assistance. AS(7555)'

Read more: External forwarding from Office 365 Exchange mailbox stops working