Management consultancy seeks document management system (DMS)

We are a management consultancy based in southern Germany and are looking for a document management system (DMS) for our shared office space.

The software should meet the following requirements:

• Digital archiving
• Everything stored in one place with access for everyone
• Automated indexing and versioning
• OCR and full-text search
• Invoice processing with digital stamps and comments
• Compatible with MS Office
• Interface to CRM
• Mobile access
• Web-based – cloud-based and SaaS

Because of Apple, iOS, Intel, MS Windows 10 – is this generally possible or is it necessary to switch to the same hardware or software?

Four software workstations are planned. We aim to work with a general or universal license (for 4 users).