Will one LOR from my workplace and one from my college professor in their respective formats be acceptable and not questioned by universities for a Master's?

Your combination of one workplace LOR and one professor LOR is genuinely acceptable for most Master's applications, as long as each letter follows its own correct format and your target program asks for exactly two letters. Universities respect the difference between a corporate letterhead and an academic one, so the mismatch in style is not the issue; the number of letters required and the nature of your specific programme are what actually decide whether this combination gets questioned.

When This Combination Is Safe Versus Risky

Formatting Details That Prevent Questions

• Your academic letter should sit on college letterhead using an official university email; your professional letter should sit on company letterhead with a corporate email.
• Your professor should focus on your academic grades and classroom performance; your manager should focus on teamwork, problem solving and specific project deliverables.
• Ask both recommenders for specific, concrete details, such as a named project or exam result, rather than vague general praise.
• Make sure both recommenders use official domain emails, since personal Gmail or Yahoo addresses are very likely to be questioned or rejected.

My Advice

Confirm the exact number of letters your target program requires before you finalise your two recommenders, since that single detail decides whether your professional plus academic mix is complete or short by one. Share the program name and your years of experience with me, and I can tell you quickly whether your current LOR combination matches what that specific type of Master's typically expects.