DCSW: Follow up fixes from QA

[MagnusHJensen]

Related issue:
Resolves #35944
Resolves #35946
Resolves #35952
Resolves #35943

Checklist for submitter

Testing

• Added/updated automated tests
• QA'd all new/changed functionality manually

[codecov]

Codecov Report

❌ Patch coverage is 94.11765% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.26%. Comparing base (f891ae9) to head (45c05f2).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
server/fleet/windows_mdm.go	91.30%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #35976      +/-   ##
==========================================
+ Coverage   66.25%   66.26%   +0.01%     
==========================================
  Files        2112     2112              
  Lines      179529   179544      +15     
  Branches     7508     7508              
==========================================
+ Hits       118949   118979      +30     
+ Misses      49681    49670      -11     
+ Partials    10899    10895       -4     

Flag	Coverage Δ
backend	67.90% <94.11%> (+0.01%)	⬆️

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