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Microsoft fixes Outlook clients not syncing over Exchange ActiveSync

ID: 534f532d-f02e-534c-b6ef-fcc0229eac75

STIX ID: report--534f532d-f02e-534c-b6ef-fcc0229eac75

Feed Name: Bleeping Computer

Date Published: 2024-03-01

Date Updated: 2026-04-20

Author: Sergiu Gatlan

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Microsoft resolved an Outlook for Microsoft 365 bug that disrupted Exchange ActiveSync connectivity in Version 2401 Build 17231.20182; users are advised to update to Version 2402 Build 17328.20068 or later, or temporarily revert to an unaffected build as a workaround. The report also notes an ongoing investigation into ICS-related security alerts and recaps recent Outlook reliability fixes affecting connection stability, email sending for users with many folders, and crashes with Outlook.com accounts.

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