GetOption was introduced to the NotesDatabase class in V6. It allows to determine, if specific options are set or not.

By design, it only accesses $dboptions1 from the database. Other options are stored in $dboptions2 – 4.
Those option bits are not accessible using NotesDatabase.getOption(optionName%).

Here is code to access them.

Public Type DBOPTIONS
options (3) As Long
End Type

Public Const W32_LIB = {nnotes.dll}
Public Const TUX_LIB = {libnotes.so}

Declare Function W32_NSFDbGetOptionsExt Lib W32_LIB Alias {NSFDbGetOptionsExt}_
(ByVal hdb As Long, retDbOptions As DBOPTIONS) As Integer
Declare Function W32_NSFDbOpen Lib W32_LIB Alias {NSFDbOpen}_
(ByVal dbName As String, hDb As Long) As Integer
Declare Function W32_NSFDbClose Lib W32_LIB Alias {NSFDbClose}_
(ByVal hDb As Long) As Integer

Declare Function TUX_NSFDbGetOptionsExt Lib TUX_LIB Alias {NSFDbGetOptionsExt}_
(ByVal hdb As Long, retDbOptions As DBOPTIONS) As Integer
Declare Function TUX_NSFDbOpen Lib TUX_LIB Alias {NSFDbOpen}_
(ByVal dbName As String, hDb As Long) As Integer
Declare Function TUX_NSFDbClose Lib TUX_LIB Alias {NSFDbClose}_
(ByVal hDb As Long) As Integer


Public Function NSFDbGetOptionsExt (hDb As Long, retDbOptions As DBOPTIONS)
	If isDefined("WINDOWS") Then
		NSFDbGetOptionsExt = W32_NSFDbGetOptionsExt(hDb, retDbOptions)
	Else
		NSFDbGetOptionsExt = TUX_NSFDbGetOptionsExt(hDb, retDbOptions)
	End If
End Function

Function NSFDbOpen( db As string, hDB As Long) As Integer
	If isDefined("WINDOWS") Then
		NSFDbOpen = W32_NSFDbOpen(db,hDb)
	Else
		NSFDbOpen = TUX_NSFDbOpen(db,hDb)
	End If
End Function

Function NSFDBClose (hDb As Long)
	If isDefined("WINDOWS") Then
		NSFDbClose = W32_NSFDbClose(hDb)
	Else
		NSFDbClose = TUX_NSFDbClose(hDb)
	End If
End Function

Sample:

Const  DBOPT_IS_IMAP = &h01000000

Sub Initialize
	Dim hDb As Long
	Dim rc As Integer
	Dim sDb As String
	
	Dim retDbOptions As DBOPTIONS
	
	sDb = "serv01/singultus!!mail/buser.nsf"
	
	rc = NSFDbOpen(sDb, hDb)
	
	If rc = 0 Then
		rc =  NSFDbGetOptionsExt (hDb, retDbOptions)
		If retDbOptions.options(1) And DBOPT_IS_IMAP Then
			MsgBox "IMAP enabled"
		Else 
			MsgBox "IMAP not enabled"
		End If
		rc = NSFDbClose(hDb)
	End If
End Sub

I have created an enhancement request for an optional method parameter to access the different optionsStores.
If you think, that this might give you some benefit, pls upvote my idea https://domino.ideas.aha.io/ideas/DDXP-I-508