To Show how long a task took between 2 dates / times not including weekends

[Missingthepower]

Hi All

I'm hoping this is a fairly easy one

In my date i have 2 columns

Submission Date = 11/03/2020 17:20:06

Marked Date = 12/03/2020 10:01:42

I have 3rd column - this is the column im trying to Create

Time Within 24hrs SLA = 17

Code Used: 

Time Within 24hr SLA = DATEDIFF('Activity Submission'[Submission Date],'Activity Submission'[Marked Date Time],HOUR)

But the 2 bits i would like to add - which I'm super struggling with is

1) Answer to show in DD:H:M:SS

2) If a submission falls on a weekend, the weekend days are not to be included in the SLA period

Example it's submitted on the Saturday the SLA doesn't start until the Monday and similarly if it's

submitted on the Friday it misses the weekends but contines onto Monday

Thank you all for your help in advance !

[Missingthepower]

Hi Hope you are well

I have tried a couple of the codes, and there do bring back a result but unfortunately there bring back the same result on every row

I think it because of the MAX Function?

I'm looking for the calculation to give me a different result for each row

Example 00days 5hours 30mins everyrow

Where i would like to see

00days 5hours 30mins

01days 2hours 22mins

00days 0hours 10mins etc

What would I need to change to make this work? Apologises and fairly new to this so I don't quite understand all the different function

Thank you for your help in advance @Greg_Deckler 

[Greg_Deckler]

Maybe:

https://community.powerbi.com/t5/Quick-Measures-Gallery/Net-Work-Days/m-p/367362#M109

[Missingthepower]

Wow thank you for the quick response, I shall definitley take a look and get back to you and let you know which one worked!!

[Greg_Deckler]

You probably need a combination of these two:

https://community.powerbi.com/t5/Quick-Measures-Gallery/Chelsie-Eiden-s-Duration/m-p/793639#M389

https://community.powerbi.com/t5/Quick-Measures-Gallery/Net-Work-Duration-Working-Hours/m-p/481543#M...