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[GLOBAL][Collaborative solutions] - MX Plan /Email Pro /Hosted Exchange /Private Exchange incident notification
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Identified
We are waiting for Microsoft Security fix for our Exchange Collaborative solutions MX Plan, Email Pro, Hosted and private to fix some side effects related to mitigation
Here are some supplementary details :
Start time : 20/05/2026 08:42 UTC
Impacted Service(s) : Some MX Plan, Email Pro, Hosted Exchange and Private Exchange operations is temporarily unavailable.
Customers Impact : Customers may have the following issues :
OWA Print Calendar functionality might not work
OWA light mode does not work properly
Signature or images not displayed properly
Preview of attachments not working properly
Public calendar URLs generating error 500 in browser.
Ongoing Actions : We are waiting for Microsoft Security fix for our Exchange Collaborative solutions MX Plan, Email Pro, Hosted and private to fix some side effects related to mitigation.
We will keep you updated on the progress and resolution.
We apologize for any inconvenience caused and appreciate your understanding.
Here are some supplementary details :
Start time : 20/05/2026 08:42 UTC
Impacted Service(s) : Some MX Plan, Email Pro, Hosted Exchange and Private Exchange operations is temporarily unavailable.
Customers Impact : Customers may have the following issues :
OWA Print Calendar functionality might not work
OWA light mode does not work properly
Signature or images not displayed properly
Preview of attachments not working properly
Public calendar URLs generating error 500 in browser.
Ongoing Actions : We are waiting for Microsoft Security fix for our Exchange Collaborative solutions MX Plan, Email Pro, Hosted and private to fix some side effects related to mitigation.
We will keep you updated on the progress and resolution.
We apologize for any inconvenience caused and appreciate your understanding.
This incident affects: Collaborative solutions || Office (Operations), Collaborative solutions || EmailPro (Operations), and Collaborative solutions || Hosted Exchange (Operations).