Standard Dynamics 365 Business Central ships with a single, generic look — the same blue header, the same default Role Centers for every user. For organizations running multiple companies, brands, or distinct departments in one tenant, that uniformity creates confusion and a flat, off-the-shelf feel. Theming & UX Personalization is a build-to-order AL extension that ECOSIRE designs, builds, installs and supports on your Business Central environment to fix exactly that.

We deliver it as a per-tenant extension (not a public AppSource listing) deployed straight to your Production and Sandbox environments via the Extension Management page or the Admin Center. It applies custom color palettes and your logo to the client shell, drives per-company / per-environment branding so users instantly know whether they're in "Production – Brand A" or a sandbox, and ships Role Center layout presets tailored to each permission set and persona.

Under the hood it uses page extensions, table extensions and event subscribers (for example on company switch and Role Center open) to apply rules without touching base application objects. Field highlight and watermark rules draw the eye to critical fields and stamp non-production environments with a clear watermark to prevent costly mistakes. Light/dark presets and accessibility options (contrast, font scaling, focus cues) round out the experience.

Because it's build-to-order, the configuration is yours — your colors, your companies, your role mappings — and ECOSIRE owns the AL code, the install, and ongoing compatibility as Microsoft ships BC updates. No DIY AL project to staff, no generic theme to wrestle into shape. Honest lead time, real engineering, full support.