Microsoft’s service health page on Friday, 13 November said users of Exchange Online may be unable to access their mailbox using Outlook on the web, Outlook desktop, Exchange ActiveSync or REST-based connections, and that “email delivery may be delayed.” Microsoft titled the incident “Users may be unable to connect to multiple Microsoft 365 services.”
What the notice lists
In Teams, Microsoft listed failures in scenarios that depend on Exchange Online, including calendar scheduling, invites, viewing and meeting edits, while joining calls and meetings was not impacted. Microsoft Graph API requests that access Exchange Online data such as mail, calendar and contacts may time out. Users may also be intermittently unable to sign in to the Power Apps or Field Service mobile apps.
Microsoft said the incident “was introduced by an issue during an earlier network capacity upgrade that surfaced following a recent network change,” that “This was a technical issue not related to cyber or AI / agents,” and that it is “seeing broad recovery and stability across our services.” A full post-incident report will follow.
Why it matters for sales teams
Outbound sequences, CRM email sync and meeting booking tools that connect to Microsoft 365 mailboxes read and write the same Exchange mail and calendar data the notice lists. A delayed send can land after a follow-up step, and a booking confirmation can fail to reach the buyer’s calendar.
Once Microsoft marks the incident resolved, RevOps teams can pull sequence steps and booking confirmations sent during the window, check them against delivery logs, and resend invites for meetings booked in that period. Teams adding Microsoft agents to the sales stack can see how those tools reach CRM data in our coverage of Microsoft’s sales MCP server and its Sales Development Agent’s Copilot credit billing.
Source: Microsoft 365 Service health
