PEXOR On Call · Microsoft 365

External Microsoft 365 on-call coverage for organisations with their own IT team

Keep your own Microsoft team. Outsource only the out-of-hours standby layer: evenings, nights, weekends and public holidays.

PEXOR handles pre-agreed critical Microsoft 365 incidents from initial triage and technical containment through controlled handover. Not full IT outsourcing; senior Microsoft expertise when an incident cannot wait until the next business day.

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Why it exists

Continuity without permanently putting your best Microsoft specialists on standby

Senior specialists should not have to cover every evening, night, weekend and holiday on top of their day job.

Vacation, illness or turnover makes a small internal rota fragile and dependent on a few key people.

A generic service desk or NOC can detect incidents but often escalates complex Microsoft issues back to the internal team.

Management can preserve internal ownership while outsourcing only the specialist out-of-hours layer.

Technical scope

Where Microsoft incidents require real technical context

Identity & access

Microsoft Entra ID, Conditional Access, account compromise and agreed identity escalations.

Security response

Microsoft Defender XDR and, where agreed, Sentinel signals requiring out-of-hours action.

Messaging & collaboration

Critical incidents affecting Exchange Online and the Microsoft 365 collaboration layer.

Endpoint management

Microsoft Intune and device-related escalations affecting security or continuity.

Operating model

Runbook-first, not call-centre-first

Incident types, availability windows and response times agreed up front

Decision rights, access and break-glass procedures documented and tested

Critical-only triage and containment within the agreed runbook

Structured handover to the internal team with residual risks and follow-up actions

White-label or co-branded delivery possible for MSPs

FAQ

Frequently asked questions

Is PEXOR On Call a full 24/7 service desk?

No. It is a specialist Microsoft 365 on-call service for pre-agreed critical incidents outside business hours. Regular end-user support is outside the default scope.

Which Microsoft technologies are covered?

The core scope is Microsoft 365, Entra ID, Defender XDR, Exchange Online and Intune. Microsoft Sentinel or adjacent components can be included when explicitly agreed.

Can PEXOR deliver this white-label for an MSP?

Yes. The operating model can be partner-to-partner, including agreements on client protection, visibility, escalation and handover.

Does PEXOR replace our internal Microsoft specialists?

No. Your own team remains responsible for the environment. PEXOR takes over only the agreed out-of-hours layer and escalates internally when the runbook requires it.

Reduce standby pressure without outsourcing your Microsoft team

Discuss the current rota, which incidents genuinely cannot wait and which responsibilities PEXOR could take over in a controlled way.

Discuss your on-call model