edgeAADSTS50196: The server terminated an operation because it encountered a client request loop. Please contact your app vendor.

I had a friend put Google on and my problem is solved ?

Windows mobile Alcatel Lucent Idol 4S with Windows 10 

I use adal-angular to implement authentication (https://www.npmjs.com/package/adal-angular). Here is my code:

`var isAuthenticated = function () {

var deferred = (q as any).defer();

if (!_adal._renewActive && !_oauthData.isAuthenticated) {
    if (!_adal._getItem(_adal.CONSTANTS.STORAGE.FAILED_RENEW)) {
        // Idtoken is expired or not present
        _adal.acquireToken(_adal.config.loginResource, function (error, tokenOut) {
            if (error) {
                _adal.error('adal:loginFailure', 'auto renew failure');
                AppInsight.trackTrace("Auto renew failure");
                AppInsight.trackException(error, { additionalMessage: 'Auto renew failure' });
                deferred.reject();
            }
            else {
                if (tokenOut) {
                    _oauthData.isAuthenticated = true;
                    deferred.resolve();
                }
                else {
                    AppInsight.trackTrace("Tokenout is null");
                    deferred.reject();
                }
            }
        });
    }
    else {
        deferred.resolve();
    }
}
else {
    deferred.resolve();
}

return deferred.promise;

}

var makeRequest = function (settings) {

var deferred = (q as any).defer();

var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
    if (this.readyState === 4) {
        if (this.status === 200) {
            deferred.resolve(this.response);
        }
        else if (this.status >= 400) {
            deferred.reject();
        }
    }
}
xhr.open(settings.method || 'GET', settings.url, true);

for (var header in settings.headers) {
    xhr.setRequestHeader(header, settings.headers[header]);
}

xhr.responseType = settings.dataType || 'json';
xhr.send(settings.data);

return deferred.promise;

}

export var adalRequest = function (settings) {

var deferred = (q as any).defer();

AppInsight.trackTrace(Start authenticate with settings: ${settings && JSON.stringify(settings)});

isAuthenticated().then(function () {
    var resource = _adal.getResourceForEndpoint(settings.url);

    if (!resource) {
        _adal.info('No resource configured for \'' + settings.url + '\'');
        deferred.reject();
        return deferred.promise;
    }

    var tokenStored = _adal.getCachedToken(resource);
    if (tokenStored) {
        if (!settings.headers) {
            settings.headers = {};
        }

        settings.headers.Authorization = 'Bearer ' + tokenStored;

        makeRequest(settings).then(deferred.resolve, deferred.reject);
    }
    else {
        var isEndpoint = false;

        for (var endpointUrl in _adal.config.endpoints) {
            if (settings.url.indexOf(endpointUrl) > -1) {
                isEndpoint = true;
            }
        }

        if (_adal.loginInProgress()) {
            _adal.info('Login already in progress');
            AppInsight.trackTrace('Login already in progress');
            deferred.reject();
        }
        else if (isEndpoint) {
            _adal.acquireToken(resource, function (error, tokenOut) {
                if (error) {
                    deferred.reject();
                    _adal.error(error);
                    AppInsight.trackException(error, { additionalMessage: `Acuire token failed for resource: ${resource}` });
                }
                else {
                    if (tokenOut) {
                        _adal.verbose('Token is available');
                        if (!settings.headers) {
                            settings.headers = {};
                        }
                        settings.headers.Authorization = 'Bearer ' + tokenOut;
                        makeRequest(settings).then(deferred.resolve, deferred.reject);
                    }
                }
            });
        }
    }
}, function () {
    _adal.login();
})
return deferred.promise;

Same issue using MS Edge from the Activation page of Settings when I click on the 'Learn more' link:

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AADSTS50196: The server terminated an operation because it encountered a client request loop. Please contact your app vendor.

Troubleshooting details

If you contact your administrator, send this info to them.

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Request Id: 592dc97d-25d0-423c-b650-7465c6662d00 

Correlation Id: 848ab0b1-b4ed-4368-8f01-102451a3090d 

Timestamp: 2020-08-08T19:45:14Z 

Message: AADSTS50196: The server terminated an operation because it encountered a client request loop. Please contact your app vendor. 

Advanced diagnostics: Enable 

If you plan on getting support for an issue, turn this on and try to reproduce the error. This will collect additional information that will help troubleshoot the issue.

All this time I was getting notified to "UPGRADE" to the NEW Microsoft Edge Browser. I was still using the "LEGACY" version, according to Microsoft. After I installed the "UPGRADE" this ERROR ISSUE went away. So I have to ASSUME it was caused by not upgrading to the newest version of MS Edge.

This fixed my issue. 

It may or may not fix your issue(s).

I will keep posting if I get another/repeat error of the AADSTS50196/server terminated an operation ERROR.