/// <summary>
/// Retreive the EWS Authentication Token
/// </summary>
/// <returns></returns>
public async Task <AuthenticationResult> RetreiveToken()
{
if (Ewstoken == null || Ewstoken.ExpiresOn >= DateTimeOffset.Now)
{
Ewstoken = await EWSConstants.AcquireTokenAsync();
}
return(Ewstoken);
}
public async System.Threading.Tasks.Task CreateExchangeServiceAsync(bool enableTrace = false)
{
var tokens = await EWSConstants.AcquireTokenAsync();
Tokens = tokens;
ExchangeService = new ExchangeService(ExchangeVersion.Exchange2013, TimeZoneInfo.Local)
{
Url = new Uri($"{EWSConstants.EWSUrl}/EWS/Exchange.asmx"),
Credentials = new OAuthCredentials(Tokens.AccessToken)
};
if (enableTrace)
{
ExchangeService.TraceEnabled = enableTrace;
ExchangeService.TraceFlags = TraceFlags.All;
}
}