Issues with Exchange Online, OneDrive for Business (Oct. 8, & 16, 2020)

[German]Microsoft’s online services Exchange Online (incident: EX224266 dated October 8, 2020), as well as OneDrive for Business in conjunction with SharePoint Online (incident OD224379 dated October 16, 2020) were/are affected by a malfunction. Brief overview of the information provided by Microsoft.


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Blog reader Andreas P. has just provided me with the relevant status messages from the administrator dashboard (thanks for that).

EX224266: Malfunction in Exchange Online since Oct. 8, 2020

Some Exchange Online users have been unable to send e-mail since October 8, 2020 because they receive an error message due to a quota override. As of October 16, 2020, Microsoft provided the following details of the “Message can’t be submitted because the sender’s submission quota was exceeded” error message in Exchange Online. The above message may appear when sending messages. According to the following status messages, this error has existed since October 8, 2020.

Published Time: 16.10.2020 18:55:49
Title: Some users may be unable to send email messages
User Impact: Users may receive a Non-Delivery Report (NDR) when attempting to send email messages.
More info: The NDR error message reads “Message can’t be submitted because the sender’s submission quota was exceeded”.
Current status: We’re continuing to deploy the fix to the affected environment and will provide a timeline for complete saturation as soon as one becomes available.
Scope of impact: A small number of users may be impacted by this issue.
Start time: Thursday, October 8, 2020, at 2:54 PM UTC
Root cause: A recent service update inadvertently caused an issue where sent emails are being miscounted, resulting in users being unable to send email messages.

According to Microsoft, only a few users are affected and Microsoft has been working on this bug for several days. On October 15, 2020 an update of the Exchange Online functions was promised. Microsoft names the cause as follows:

We’ve determined that a recent service update inadvertently caused an issue where sent emails are being miscounted, resulting in users being unable to send email messages. We’ve raised sending limits for some users and confirmed that this has resolved impact. In parallel, we’re working to formulate potential mitigation actions, including a code fix.

During the development of the fix, Microsoft people discovered an unrelated problem that would affect the use of the test environment. As a result, it took a little longer to rework the fix. Although the problem was resolved by a fix on October 8, 2020, the fix was not released until the end of the year. However, on October 16, 2020 Microsoft writes:

Current status: We’re continuing to deploy the fix to the affected environment and will provide a timeline for complete saturation as soon as one becomes available.

It seems that the problem has not yet been completely solved.


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OD224379: Sync issue with OneDrive for Business (Oct. 16, 2020)

Since Oct. 16, 2020 there is a service disruption in the environment of SharePoint Online in connection with OneDrive for Business. The synchronization of the SharePoint Online Team Site Libraries with OneDrive for Business does not work. Microsoft announces the following status information.

Published Time: 17.10.2020 03:18:08
Title: Some users may be unable to sync SharePoint Online team site libraries with OneDrive for Business
User Impact: Users may be unable to sync SharePoint Online team site libraries with OneDrive for Business.
More info: This issue only affects users who are using the classic experience. If possible, we recommend users utilize the modern experience, as it is unaffected by this issue. Additional information about experiences can be found here: https://support.microsoft.com/en-us/office/sharepoint-classic-and-modern-experiences-5725c103-505d-4a6e-9350-300d3ec7d73f
Current status: We’ve completed our validation of the fix and we’re initiating our deployment procedures to the affected environment to resolve the issue. We’ll monitor its progress throughout the weekend and we’ll provide a deployment update by the next update time.
Scope of impact: This event impacts users attempting to sync SharePoint Online team site libraries with OneDrive for Business within the classic experience.
Preliminary root cause: A recent change inadvertently affected the validation of specific Globally Unique Identifiers (GUIDs) which is preventing users from syncing SharePoint Online team site libraries with OneDrive for Business.
Next update by: Monday, October 19, 2020, at 10:00 PM UTC

The initial report was made on 16.10.2020 02:23:07 time with the following status information: 

Title: Some users may be unable to sync SharePoint Online team site libraries with OneDrive for Business
User Impact: Users may be unable to sync SharePoint Online team site libraries with OneDrive for Business.
Current status: We’ve determined that a recent change inadvertently affected the validation of specific Globally Unique Identifiers (GUIDs) which is preventing users from syncing SharePoint Online team site libraries with OneDrive for Business. We’re developing a fix that we expect will remediate impact and will provide an estimated timeline for deployment with our next update.
Scope of impact: This event may impact some users attempting to sync SharePoint Online team site libraries with OneDrive for Business.
Root cause: A recent change inadvertently affected the validation of specific Globally Unique Identifiers (GUIDs) which is preventing users from syncing SharePoint Online team site libraries with OneDrive for Business.

Anyone of you affected?


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