Microsoft’s Outlook app is crashing for European users due to memory issues, Redmond warned, and there are indications the problems are spreading to the US.

“We are investigating an issue where users in Europe may experience crashes, not receiving emails, or experiencing high memory usage when using the Outlook client,” Redmond warned.

“We are analyzing data from customers who experienced crashes and high memory usage when using the new Outlook desktop app. We are reviewing service telemetry and reproducing the issue internally to develop a mitigation plan.”

There’s no word yet on Microsoft’s plan, but social media reports suggest that at least the US East Coast is suffering from similar problems. Downdetector points out that the problem appears to be spreading.

“It’s now spread across the country like a cold and I can’t seem to figure out what’s causing it,” one user reported. “There have been no changes to the environment and no updates to the Windows desktops that are experiencing this issue.”

Microsoft engineers are working on the issue and trying to figure out what the problem is. Things aren’t looking good for a software giant’s main email system.

“We are focused on isolating the source of a potential memory management issue that may be responsible for the impact,” Microsoft said. “We are working with organizations and replicating the issue internally to develop a workaround. For more information, see MO907654 in the Admin Center.”

“We are working on a possible solution and are preparing to apply a targeted configuration update that we suspect will mitigate the impact,” it said.

Meanwhile, a Microsoft spokesman announced this The Register“We are investigating an issue that is currently affecting a limited number of users accessing some of our Services. For more information, see Microsoft 365 status on X.”

Shortly before this story was published, Microsoft said it had implemented a fix whose advice essentially boiled down to turning Outlook off and on again.

“We made a configuration change and telemetry confirmed that we had mitigated the impact,” Redmond said. “Users should refresh/restart their Outlook sessions.” ®