As of now, Adobe Reader XI is unsupported and potentially unsafe. If you must install this specific version: Update Reader 11.0.23 to "what"? And how? | Community
: Version 11 allows you to fill out and save data in any fillable PDF form. A purple message bar will appear at the top of the document to indicate if a form is fillable. Commenting & Markup
Unlike Acrobat Reader DC, which constantly phones home to Adobe’s licensing servers, Reader XI (especially 11.0.23) can be fully managed via GPO (Group Policy Objects) without intrusive cloud features. IT teams search for the "Full installer with updates slipstreamed" (the 11.0.23 patch integrated into the base MSI).
: By default, Adobe Reader XI opens documents in "Protected Mode" for Windows users to provide a layer of security against malicious files. 2. Installation and Updates
