- Budget constraints for hybrid fleets
- For organizations planning to manage hundreds or thousands of Arc-enabled servers where per-server charges are material, alternative approaches such as in-place SCCM/WSUS or other patch suites may be more cost-effective.
- Need for deep enterprise patch governance and reporting
- If mature approval rings, granular deployment targeting, and highly detailed reporting comparable to Configuration Manager are required, consider SCCM/MCM or enterprise patch platforms.
- Complex coexistence with WSUS/GPO/SCCM
- Environments with extensive WSUS or Group Policy configurations may experience friction; policy interactions should be validated in a pilot.
- Dependency on unsupported images or strict migration requirements
- Managed service provider reports indicate certain custom and CIS marketplace images may be unsupported, which can block migration or limit orchestration.
- Reporting mismatches
- Community reports describe discrepancies between service-reported success states and local OS update state, indicating possible scan-timing or state synchronization edge cases.
- Differences versus legacy Update Management
- Update Manager does not write to legacy Log Analytics Update tables used by the previous Update Management model; results are exposed via other platform mechanisms, which may require customers to adapt reporting and alerting approaches.
- Alerting maturity
- Some alerting features for assessment and patch failures were reported to be in early stages; buyers should validate alerting capabilities against operational requirements.
- Support matrix constraints
- Supported update sources, OS versions, and image types are governed by vendor support matrices; confirm coverage for specific OS versions, images, and third-party applications.
- Migration limitations from Configuration Manager
- Vendor guidance indicates Update Manager does not fully replace all Configuration Manager migration scenarios and that WSUS approval workflows remain relevant for certain first-party patching scenarios.