I would use a Create Script, eg:

if (Values("Act")=="201"){ //company change
 var userid=CRM.GetContextInfo("Users","User_UserId");
 if (!(userid==27 || userid==28 || userid==32 || userid==38)){
  Hidden=true;
 }
}

Thank you so much - we have tried this and it does hide the field, but for everyone and doesn't take into account the user id's.  Do you know why this might be?

Hi Sarah

How are the list of 4 people defined?  Are you using Company Team?

No it would have to be by their user ID, is it possible to do this?

Sorry - my bad.  "Users" should be "User" in the GetContextInfo():

if (Values("Act")=="201"){ //company change
 var userid=CRM.GetContextInfo("User","User_UserId");
 if (!(userid==27 || userid==28 || userid==32 || userid==38)){
  Hidden=true;
 }
}

No reason why Pauls version using "User" shouldn't work.... or you could use  CurrentUser

var userid = CurrentUser.user_userid;
if (Values("Act")=="201")
{
if (!(userid==27 || userid==28 || userid==32 || userid==38))
{
Hidden=true;
}
}

if you are still struggling, I would ask your business partner for help.

Thank you so much :) this worked perfectly.  I was in too much of a panic on the script to notice the plural too.  Thank you again

Thank you Sean - really appreciate your feedback.  I will keep this as another possible answer.  Thank you :)

You can see company teams here:  Sage CRM - Security Administration - Use Company Teams - YouTube

This feature allows you to list additional users that have permissions over the company (useful when some information is then classified as sensitive.

Because this is information that is stored in the database (in the table 'Team).  The team table is related to company in a similar way that the Notes table links to the Company via a Foreign Table ID and Foreign ID.  

Create scripts can use the Record Object to check the data in the database.  You then could have different people associated with different companies and nothing would be hard coded.

Hi Sean

I’m dealing with a similar requirement: Make ReadOnly all fields on OpportunityDetailBox for several users if oppo_stage is closed.

I know your solution work for sure:

var userid = CurrentUser.user_userid;
if (Values("Act")=="523"  && Values(Oppo_status ==”Closed”)){
   if (!(userid==27 || userid==28 || userid==32 || userid==38)){
      ReadOnly =true;
   }
}

But have to put this script on the create script of every field and have 20+ fields on screen, so this is hard to maintain after.

Did you know any way to do it with all fields on screen with a single script?

If you want to process several fields in one script then I think you'll have to do it client-side. The server-side field create scripts only expose the properties for the field that the script is 'on'.

Another way to look at it is to put a script in that removes the Change button if the Opportunity is closed for certain users. Would be a shorter scripting than naming all 20+ fields

Good Point!