"We designed the default voicemail greetings to all users to standardize the feature across all Microsoft services." through. First, having a standard voicemail greeting cannot possibly work for someone who uses Skype for business. Or whose computer is set up to work in one language but expects callers using a different language.
Nobody wants to listen to a long-winded voicemail. Keep your greeting short, simple, and concise. A voicemail message should pique a client’s interest and leave them looking forward to your call. Stick to the basics, explaining your company name, hours of operation, and when to expect a callback.

True emergencies - such as extraordinary weather - should be addressed in your voicemail if it impacts your business. Thank you for calling the Carona Surf Shop. We are currently closed due to the inclement weather. Our normal business hours are Monday through Saturday, 10 am to 9 pm. Please visit www.caronasurfshop.com to order merchandise and to check our schedule during the hurricane.
To clear any customers doubts or expectations, make sure to mention on your voicemail when you’ll be available. Don’t say that you will “try” to return their call. Instead, offer them a realistic timeframe in which they can expect their call to be returned, so they know what to expect - whether it will take you 24 hours or a week to get back to them. This will eliminate your customer’s worries about your timeliness and encourage them to wait for your reply instead of heading over to your competitors.