Handle broader set of user not found error codes (#3678)

graph has been inconsistent about what error code is returned
when the user doesn't exist. Expand the set of things we
check so that hopefully we'll get them all

Always return an error if the user doesn't exist as determined
by checking for exchange folders during GetInfo calls

Also add a little more stack trace info to returned errors

---

#### Does this PR need a docs update or release note?

- [ ] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [x] ⛔ No

#### Type of change

- [ ] 🌻 Feature
- [x] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

#### Issue(s)

* fixes #3672

#### Test Plan

- [x] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E

src/internal/m365/discovery/discovery_test.go

@@ -214,7 +214,7 @@ func (suite *DiscoveryIntgSuite) TestUserInfo() {
 				ServicesEnabled: map[path.ServiceType]struct{}{},
 				Mailbox:         api.MailboxInfo{},
 			},
-			expectErr: require.NoError,
+			expectErr: require.Error,
 		},
 	}
 	for _, test := range table {

src/internal/m365/graph/errors.go

@@ -38,11 +38,15 @@ const (
 	nameAlreadyExists       errorCode = "nameAlreadyExists"
 	quotaExceeded           errorCode = "ErrorQuotaExceeded"
 	RequestResourceNotFound errorCode = "Request_ResourceNotFound"
-	resourceNotFound        errorCode = "ResourceNotFound"
-	resyncRequired          errorCode = "ResyncRequired" // alt: resyncRequired
-	syncFolderNotFound      errorCode = "ErrorSyncFolderNotFound"
-	syncStateInvalid        errorCode = "SyncStateInvalid"
-	syncStateNotFound       errorCode = "SyncStateNotFound"
+	// Returned when we try to get the inbox of a user that doesn't exist.
+	resourceNotFound errorCode = "ResourceNotFound"
+	// Some datacenters are returning this when we try to get the inbox of a user
+	// that doesn't exist.
+	invalidUser        errorCode = "ErrorInvalidUser"
+	resyncRequired     errorCode = "ResyncRequired"
+	syncFolderNotFound errorCode = "ErrorSyncFolderNotFound"
+	syncStateInvalid   errorCode = "SyncStateInvalid"
+	syncStateNotFound  errorCode = "SyncStateNotFound"
 	// This error occurs when an attempt is made to create a folder that has
 	// the same name as another folder in the same parent. Such duplicate folder
 	// names are not allowed by graph.
@@ -131,7 +135,22 @@ func IsErrExchangeMailFolderNotFound(err error) bool {
 }
 
 func IsErrUserNotFound(err error) bool {
-	return hasErrorCode(err, RequestResourceNotFound)
+	if hasErrorCode(err, RequestResourceNotFound, invalidUser) {
+		return true
+	}
+
+	if hasErrorCode(err, resourceNotFound) {
+		var odErr odataerrors.ODataErrorable
+		if !errors.As(err, &odErr) {
+			return false
+		}
+
+		mainMsg, _, _ := errData(odErr)
+
+		return strings.Contains(strings.ToLower(mainMsg), "user")
+	}
+
+	return false
 }
 
 func IsErrResourceNotFound(err error) bool {

src/internal/m365/graph/errors_test.go

@@ -12,6 +12,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
 
+	"github.com/alcionai/corso/src/internal/common/ptr"
 	"github.com/alcionai/corso/src/internal/tester"
 	"github.com/alcionai/corso/src/pkg/fault"
 )
@@ -231,11 +232,36 @@ func (suite *GraphErrorsUnitSuite) TestIsErrUserNotFound() {
 			err:    odErr("fnords"),
 			expect: assert.False,
 		},
+		{
+			name: "non-matching resource not found",
+			err: func() error {
+				res := odErr(string(resourceNotFound))
+				res.GetError().SetMessage(ptr.To("Calendar not found"))
+
+				return res
+			}(),
+			expect: assert.False,
+		},
 		{
 			name:   "request resource not found oDataErr",
 			err:    odErr(string(RequestResourceNotFound)),
 			expect: assert.True,
 		},
+		{
+			name:   "invalid user oDataErr",
+			err:    odErr(string(invalidUser)),
+			expect: assert.True,
+		},
+		{
+			name: "resource not found oDataErr",
+			err: func() error {
+				res := odErr(string(resourceNotFound))
+				res.GetError().SetMessage(ptr.To("User not found"))
+
+				return res
+			}(),
+			expect: assert.True,
+		},
 	}
 	for _, test := range table {
 		suite.Run(test.name, func() {

src/pkg/services/m365/api/users.go

@@ -200,12 +200,14 @@ func (c Users) GetInfo(ctx context.Context, userID string) (*UserInfo, error) {
 
 		if graph.IsErrUserNotFound(err) {
 			logger.CtxErr(ctx, err).Error("user not found")
-			return nil, clues.Stack(graph.ErrResourceOwnerNotFound, err)
+			// FIXME(ashmrtn): This shouldn't need clues.Wrap.
+			return nil, clues.Wrap(clues.Stack(graph.ErrResourceOwnerNotFound, err), "")
 		}
 
 		if !graph.IsErrExchangeMailFolderNotFound(err) {
 			logger.CtxErr(ctx, err).Error("getting user's mail folder")
-			return nil, err
+			// FIXME(ashmrtn): This should use clues.Stack.
+			return nil, clues.Wrap(err, "")
 		}
 
 		logger.Ctx(ctx).Info("resource owner does not have a mailbox enabled")
@@ -243,7 +245,8 @@ func (c Users) GetInfo(ctx context.Context, userID string) (*UserInfo, error) {
 	err = c.getFirstInboxMessage(ctx, userID, ptr.Val(inbx.GetId()))
 	if err != nil {
 		if !graph.IsErrQuotaExceeded(err) {
-			return nil, err
+			// FIXME(ashmrtn): This should use clues.Stack.
+			return nil, clues.Wrap(err, "")
 		}
 
 		userInfo.Mailbox.QuotaExceeded = graph.IsErrQuotaExceeded(err)