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[GLOBAL][Collaborative solutions] - MX Plan /Email Pro /Hosted Exchange /Private Exchange incident notification
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We have new information regarding the incident that affected your service(s).
Please find below an update on the situation:
Update : Our teams have taken security action on our infrastructure to fix the issue. Customers do not need to take any action.
Ongoing Actions : We are still awaiting a cumulative patch from Microsoft that is expected to address these issues for a definitive fix.
Here a link to follow more information : https://techcommunity.microsoft.com/blog/exchange/released-june-2026-exchange-server-security-updates/4524491
We will keep you updated on the progress and resolution.
We apologize for any inconvenience caused and appreciate your understanding.
Please find below an update on the situation:
Update : Our teams have taken security action on our infrastructure to fix the issue. Customers do not need to take any action.
Ongoing Actions : We are still awaiting a cumulative patch from Microsoft that is expected to address these issues for a definitive fix.
Here a link to follow more information : https://techcommunity.microsoft.com/blog/exchange/released-june-2026-exchange-server-security-updates/4524491
We will keep you updated on the progress and resolution.
We apologize for any inconvenience caused and appreciate your understanding.
Update
We have new information regarding the incident that affected your service(s).
Please find below an update on the situation:
Update : We are currently awaiting a patch from Microsoft that is expected to address these issues.
Ongoing Actions : The issue remains under review on their side, and we are actively following up to obtain further updates.
We will keep you updated on the progress and resolution.
We apologize for any inconvenience caused and appreciate your understanding.
Please find below an update on the situation:
Update : We are currently awaiting a patch from Microsoft that is expected to address these issues.
Ongoing Actions : The issue remains under review on their side, and we are actively following up to obtain further updates.
We will keep you updated on the progress and resolution.
We apologize for any inconvenience caused and appreciate your understanding.
Update
We have new information regarding the incident that affected your service(s).
Please find below an update on the situation:
Update : At this time, we are still awaiting a fix from Microsoft. The issue remains under review on their side, and we are actively following up to obtain further updates.
Ongoing Actions : The incident has been identified and the provider is mobilised to restore service as quickly as possible.
We will keep you updated on the progress and resolution.
We apologize for any inconvenience caused and appreciate your understanding.
Please find below an update on the situation:
Update : At this time, we are still awaiting a fix from Microsoft. The issue remains under review on their side, and we are actively following up to obtain further updates.
Ongoing Actions : The incident has been identified and the provider is mobilised to restore service as quickly as possible.
We will keep you updated on the progress and resolution.
We apologize for any inconvenience caused and appreciate your understanding.
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).