Planned maintenance: Cloud Voicemail is migrating to a new infrastructure

Microsoft is migrating the Cloud Voicemail service to new infrastructure from mid-August to late September 2025. Tenants who allowlist specific IPs for Cloud Voicemail may face connectivity issues. If problems occur, users should contact Microsoft support for assistance. Planned maintenance: Cloud voicemail We would like to inform you that the Microsoft cloud voicemail service is now migrating to a new infrastructure. As part of this transition, tenants who have allowlisted specific IP addresses for Cloud Voicemail and blocked all other IP addresses may experience exceptions in service connectivity. If you encounter any issues or exceptions related to this migration, please open a support ticket with Microsoft for prompt assistance. When this will happen Migration began in mid-August 2025 and is projected to be completed by late September 2025. How this will affect you organization As part of this planned maintenance, Tenants who have allowlisted specific IP addresses for Cloud Voicemail and blocked all other IP addresses may experience exceptions in service connectivity.  Message ID: MC1137595

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