SharePoint migrations fail at the firewall — not because admins skip the checklist, but because no one ran an actual test from the right source server to the right destination on the right port. This post provides a config-driven, role-aware PowerShell toolkit that tests every required port across your SPSE farm, remediates blocked paths automatically, and produces an HTML report your infrastructure and security teams can sign off before the cutover window opens.#sharepoint #microsoft #sp2019 #spse #migration